CN212033767U - Novel XDSL overcurrent and overvoltage protection device - Google Patents

Abstract

The utility model relates to a novel XDSL over-current and over-voltage protection device, which comprises a shell, wherein a circuit board with a chute and electrically connected with an alarm device is arranged in the shell, and the circuit board is provided with a signal spring plate, a tripping mechanism, a three-pole discharge tube and a PTC; the tripping mechanism comprises a moving plate, a sliding block and a spring, wherein two ends of the spring are correspondingly and fixedly connected with the sliding block and the shell, the moving plate is connected with a ground wire and is fixed on the sliding block, and a welding part which moves in the sliding groove under the elastic force of the spring extends; the welding part is welded and connected with the grounding electrode of the tripolar discharge tube through alloy welding flux which is melted by heat energy when the spring is compressed; the front end of the sliding block is provided with an outer line elastic sheet electrically connected with an outer line, the outer line elastic sheet is electrically connected with the circuit board through the connecting reed when the spring is compressed, and the sliding block is connected with the alarm device and is disconnected with the connecting reed after the spring is released. The utility model discloses a provide multiple safeguard measure for external line distribution module, provide safer communication transmission line.

Description

Novel XDSL overcurrent and overvoltage protection device

Technical Field

The utility model relates to a communication line's protector, especially a novel XDSL overcurrent and overvoltage protector that provides multiple protection and report an emergency and ask for help or increased vigilance.

Background

XDSL is a communication transmission access technology using telephone lines as transmission media. The XDSL technology supports symmetric and asymmetric transmission modes on the subscriber loop of the public telephone network, solves the transmission bottleneck problem of the "last kilometer" that often occurs between the network service communication operator and the end user, and is widely deployed and applied on the global operator network as an important means of communication transmission access technology. When the XDSL line is struck by lightning and the power line is induced or contacted, the current of the XDSL line will rise rapidly to reach tens of amperes, the voltage will rise rapidly to reach hundreds or even thousands of volts, and these strong currents and/or high voltages will be transmitted to the device side through the twisted pair wires, which will affect the normal operation of the main device. Therefore, in the external wiring module, protective devices are arranged to protect the first-level overcurrent and overvoltage of lightning stroke, power line touch and induction in an XDSL circuit, but the existing protective devices are poor in protective effect and cannot accurately, timely and effectively protect and alarm under the condition of continuous overvoltage.

SUMMERY OF THE UTILITY MODEL

To the not enough of prior art, the utility model provides a novel XDSL overcurrent and overvoltage protector that multiple protection was reported an emergency and asked for help or increased vigilance is provided.

The utility model provides a technical scheme that its technical problem adopted is:

a novel XDSL over-current and over-voltage protection device comprises a shell, wherein a circuit board which is electrically connected with an alarm device and is provided with a first chute is arranged in the shell, and a signal elastic sheet, a tripping mechanism, a three-pole discharge tube and a PTC are arranged on a circuit of the circuit board; the tripping mechanism comprises a moving plate, a sliding block and a spring, wherein one end of the spring is fixedly connected with the sliding block, the other end of the spring is fixed in the shell, the moving plate is connected with a ground wire of the circuit board, one end of the moving plate penetrates out of the spring and is fixedly connected with the sliding block, the other end of the moving plate extends to form a welding part, and the welding part penetrates out of the first sliding groove and can move in the first sliding groove through the expansion and contraction of the spring; the welding part is welded and connected with the grounding electrode of the tripolar discharge tube in a spring compression state through alloy solder, and the alloy solder can be melted under the heat generated by discharge of the discharge tube; the front end of the sliding block in the shell is provided with an outer line elastic sheet electrically connected with an outer line, the outer line elastic sheet is electrically communicated with the circuit board through contact with a connecting reed arranged on the circuit board in a spring compression state, and the sliding block abuts against the signal elastic sheet after the spring is released, so that the alarm device is switched on to give an alarm and the connection between the outer line elastic sheet and the connecting reed is disconnected.

Preferably, the slider is a sliding part which is in a T shape and has a front width smaller than a rear width, the rear width of the slider is matched with the width of the shell, a second sliding groove sleeved outside the end part of the connecting spring piece is arranged at the front part of the slider, the slider slides relative to the connecting spring piece along the second sliding groove under the action of the elastic force of the spring, an inclined plane convenient for the disconnection of the outer line spring piece is arranged at the front end of the slider, a contact part positioned on the surface of the rear part is arranged at the junction of the front part and the rear part of the slider, the signal spring piece is arranged on the circuit board facing the contact part, and a through hole capable of enabling the.

Preferably, the electrode pins of the three-pole discharge tube are square.

Preferably, the PTC device and the triode discharge tube are simultaneously arranged at one end of the tripping mechanism or are correspondingly arranged at two ends of the tripping mechanism.

Preferably, the welding part and the grounding electrode of the triode discharge tube both penetrate out of the first sliding groove, the width of one end of the first sliding groove corresponding to the grounding electrode of the triode discharge tube is smaller than that of the other end of the first sliding groove, and the length of the other end of the first sliding groove is larger than that after the spring is released.

Preferably, the circuit board circuit is provided with two ground wire spring pieces serving as ground wires, and the moving piece is clamped between the two ground wire spring pieces in a spring compression state.

Preferably, the warning device is a light emitting diode arranged on the circuit board, the light emitting diode is conducted and emits light after the sliding block abuts against the signal elastic sheet, and the shell is provided with a window through which light of the light emitting diode penetrates.

Preferably, an insulating inner frame body matched and clamped with the outer shell is arranged in the outer shell, the circuit board is located at the bottom of the inner frame body, and the signal elastic sheet, the tripping mechanism, the three-pole discharge tube, the PTC, the outer wire elastic sheet and the connecting reed are all embedded in the inner frame body.

Preferably, the welded portion and the ground electrode of the triode discharge tube are welded and connected to the bottom of the wiring board, and the alloy solder is a soft solder.

Preferably, the circuit board is a 4-layer PCB, the number of the PTC, the external elastic pieces and the connecting spring pieces are two, and the two external elastic pieces and the two connecting spring pieces are symmetrically arranged.

The beneficial effects of the utility model reside in that: the utility model is used in an XDSL external wire distribution module, has stable performance, safe and reliable performance, easy processing, convenience and practicability, when the line meets lightning stroke, power line contact or induction, PTC instantly generates large resistance to block the passage of heavy current, and instantly discharges to the ground through a tripolar discharge tube to release overvoltage, the line is protected, when the line generates continuous overvoltage, the tripolar discharge tube discharges to generate heat, the resistance of a welding point of the tripolar discharge tube and a movable sheet is also heated because of overcurrent, under the combined action of the tripolar discharge tube and the movable sheet, solder is quickly melted, the movable sheet is desoldered, a spring in a compression state rebounds and drives a slide block to slide, the slide block drives the movable sheet to slide, the movable sheet is detached from being connected with a ground wire, the electric conduction alarm device gives an alarm after the slide block and a signal shrapnel are abutted against, and timely and reliable tripping action is completed, meanwhile, the front end of the sliding block rushes open the contact between the outer line spring plate and the connecting spring plate in sliding, so that the conduction between the outer line and the inner line is cut off, an outer line loop is cut off, and multiple protection effects are achieved on the line. Meanwhile, the over current in the circuit can cause the self resistance of the welding point to generate heat to jointly promote the welding flux to reach the melting point, and the device is further ensured to give an alarm timely and accurately.

Drawings

Fig. 1 is a schematic structural diagram of the first embodiment of the present invention without tripping;

fig. 2 is a schematic structural diagram of the first embodiment of the present invention after tripping;

fig. 3 is an exploded view of the first embodiment of the present invention;

FIG. 4 is a schematic bottom view of a circuit board according to a first embodiment of the present invention;

fig. 5 is a schematic structural diagram of the appearance of the first embodiment of the present invention;

fig. 6 is a schematic structural diagram of the second embodiment of the present invention without tripping;

fig. 7 is a schematic structural diagram of the third embodiment of the present invention without tripping;

fig. 8 is a schematic structural diagram of a fourth embodiment of the present invention without tripping;

part names and serial numbers in the figure: 1-shell 10-window 11-inner frame 2-alarm device 3-circuit board 30-first chute 31-ground wire shrapnel 4-signal shrapnel 40-through hole 5-tripping mechanism 50-moving plate 51-sliding block 52-spring 500-welding part 510-second chute 511-inclined plane 512-contact part 6-tripolar discharge tube 60-grounding electrode 7-PTC 8-outer wire shrapnel 9-connection reed.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, a clear and complete description will be made below with reference to the accompanying drawings and technical solutions of the embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, belong to the scope of protection of the present invention.

Furthermore, directional phrases used in the present invention, such as "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., refer only to the directions of the attached drawings, and are used for better and clearer illustration and understanding of the present invention, and do not indicate or imply orientations which the present invention must have, and therefore, should not be construed as limiting the present invention.

The embodiment of the present invention is shown in fig. 1 to 8, a novel XDSL over-current and over-voltage protection device, comprising a housing 1, wherein the housing 1 is an electrically insulated housing, for example, a plastic housing or an insulating layer is disposed on the inner and outer surfaces of the housing for insulation, a circuit board 3 electrically connected with an alarm device 2 and having a first chute 30 is disposed in the housing 1, the alarm device 2 is set to one or more of sound, light, color, etc. according to the environment of the protection device, a signal spring 4, a tripping mechanism 5, a three-pole discharge tube 6, a PTC7 are disposed on the circuit board 3, the signal spring 4 is used to turn on the alarm device 2 when over-current or over-current is generated, the tripping mechanism 5 is used to trip when over-current or over-voltage is generated, disconnect the inner and outer wires, protect the circuit, the three-pole discharge tube 6 can instantly discharge to the ground, when overvoltage is released, the electrode pins of the triode discharge tube 6 can be set to be square, the square electrode pins are convenient to weld, the connection is more reliable, the problem of poor electrical contact caused by poor connection is avoided, and the PTC7 can instantly generate large resistance when large current is generated so as to block the passage of the large current; the trip mechanism 5 comprises a moving plate 50, a sliding block 51 and a spring 52, wherein one end of the spring 52 is fixedly connected with the sliding block 51, and the other end of the spring 52 is fixed in the shell 1, so that the sliding block 51 can move relative to the shell 1 under the action of the elastic force of the spring 52, the moving plate 50 is connected with the ground wire of the circuit board 3, one end of the moving plate 50 penetrates through the spring 52 and is fixedly connected with the sliding block 51, and the other end of the moving plate 50 extends to form a welding part 500, at this time, the moving plate 50 can move along with the movement of the sliding block 51, the spring 52 is sleeved outside the moving plate 50, the expansion and contraction of the spring 52 cannot be influenced in the movement of the moving plate 50, that is, the sliding block 51 and the welding part 500 corresponding to the two ends of the moving plate 50, the spring 52 is positioned between the welding part 500 and the sliding block 51, and the welding part 500; the welding part 500 is welded with the grounding electrode 60 of the three-pole discharge tube 6 through the alloy solder in a compressed state of the spring 52, the alloy solder can be melted under the heat generated by discharge of the discharge tube, after the alloy solder is melted, the welding part 500 is disconnected with the grounding electrode 60 of the three-pole discharge tube 6, the pressure applied to the spring 52 disappears and stretches, the slide block 51 is driven by the elasticity of the spring 52 to move the moving piece 50, the welding part 500 slides in the first chute 30, at the moment, two three-pole discharge tubes 6 can be arranged and connected in series, and the grounding electrodes 60 of the two three-pole discharge tubes 6 are simultaneously welded with the welding part 500 in the first chute 30; the two three-pole discharge tubes 6 connected in series can quickly generate a large amount of heat, so that the problem that the solder is not completely melted and the alarm cannot be given is prevented; an outer line elastic sheet 8 electrically connected with an outer line is arranged at the front end of a sliding block 51 in the shell 1, the outer line elastic sheet 8 is electrically communicated with the circuit board 3 through contact with a connecting reed 9 arranged on the circuit board 3 in a compression state of a spring 52, the outer line is an XDSL circuit outside the protection device, the anti-skid device is electrically connected through the outer line elastic sheet 8 arranged in the shell when being connected into the XDSL circuit, and the sliding block 51 is abutted against a signal elastic sheet 4 after the spring 52 is released, so that the alarm device 2 is connected for alarming and the connection between the outer line elastic sheet 8 and the connecting reed 9 is disconnected. Initially, the moving plate 50 is welded with the grounding electrode 60 of the three-pole discharge tube 6 through the welding part 500 in a compressed state of the spring 52, and an alloy solder is adopted for welding, the welding has certain strength, can well adapt to the environment, and cannot generate false alarm action in high-temperature weather, the moving plate 50 is simultaneously connected with the grounding wire on the circuit board 3, the grounding loop of the circuit is in a conduction state, at the moment, the sliding block 51 is relatively fixed under the action of the tension force of the spring 52, the outer wire elastic sheet 8 and the connecting reed 9 are in electric conduction in a mutual contact way, the outer wire and the circuit board 3 are also in a mutual conduction state, the PTC7 is also in a conduction state, the whole inner and outer wire circuits are in a conduction state, when the XDSL circuit is struck by lightning, contacted by a power line or induced, the PTC7 instantly generates large resistance to block the passage of large current, and the tripping mechanism 5 instantly discharges, the overvoltage is released to protect the circuit, when the continuous overvoltage occurs on the circuit, the tripolar discharge tube 6 discharges to generate heat, the self resistance of the welding point of the tripolar discharge tube 6 and the moving plate 50 also generates heat due to the overcurrent, the solder can be quickly melted under the combined action of the tripolar discharge tube 6 and the moving plate 50, the moving plate 50 is desoldered, the spring 52 in a compression state rebounds, and drives the slide block 51 to slide, the slide block 51 drives the moving plate 50 to slide, the moving plate 50 is disconnected from the ground wire, the alarm device 2 is electrically conducted to give an alarm after the sliding block 50 is abutted against the signal elastic sheet 4, the tripping alarm action is timely and reliably completed, when the slide block 51 slides, the front end of the slide block rushes open the contact between the outer line elastic sheet 8 and the connecting spring sheet 9, so that the conduction between the outer line and the inner line is disconnected, the outer line loop is cut off, and the three-pole discharge tube 6 is disconnected and the tripping mechanism 5 is tripped, and the linkage plays a role in double protection. At the moment, the over-current in the circuit causes the self-resistance of the welding point to generate heat to promote the solder to reach the melting point, and further the device can give an alarm timely and accurately.

In a further improvement, as shown in fig. 1 to 8, the slider 51 is a T-shaped slider with a front width smaller than a rear width, the width of the rear portion of the slider 51 matches the width of the housing, so that the sliding direction of the slider 51, i.e. the sliding along the direction of the elastic force of the spring 52, is ensured, the width of the front portion smaller than the width of the rear portion facilitates the arrangement of components in the housing 1, the slider 51 slides forwards without being hindered, the sliding is smooth, and the purpose of trip protection can be effectively achieved, the front portion of the slider 51 is provided with a second sliding slot 510 sleeved outside the end portion of the connection reed 9, the slider 51 slides along the second sliding slot 510 relative to the connection reed 9 under the elastic force of the spring 52, when the spring 52 is in a compressed state, i.e. the line is in a normal state, the front portion of the slider 51 is sleeved outside the end of the connection reed 9 opposite to the, after the welding of the moving plate 50 and the three-pole discharge tube 6 is melted, the spring 52 rebounds, the sliding block 51 slides forwards along the second sliding groove 510 by taking the connecting reed 9 as a sliding shaft, when the front end of the sliding block 51 touches the contact position of the outer line elastic sheet 8 and the connecting reed 9, the groove wall of the second sliding groove 510 is clamped into the contact position and slides forwards to break the contact of the outer line elastic sheet 8 and the connecting reed 9, so that a conduction loop of the inner line and the outer line is broken, the front end of the sliding block 51 is provided with an inclined plane 511 which is convenient for the breaking of the outer line elastic sheet 8, the arrangement of the inclined plane 511 ensures that the sliding block 51 does not have an excessively sharp edge to damage the outer line elastic sheet 8 when the outer line elastic sheet 8 is broken, the inclined plane 511 contracts forwards towards the axial direction of the sliding block, so that the connection between the outer line elastic sheet 8 and the connecting reed 9 can be broken by gently applying force on the outer line elastic sheet 8, the sliding block 51, the signal spring 4 is arranged on the circuit board 3 facing the contact part 512 and the signal spring 4 is provided with a through hole 40 for the front part of the sliding block 51 to pass through, when the slide block 51 slides to disconnect the external spring 8 and the connection spring 9, the signal spring 4 contacts with the contact part 512 of the slide block 51 to electrically conduct the alarm device 2 for alarming, the through hole 40 of the signal spring 4 facilitates the slide of the slide block, the through hole 40 can be a U-shaped opening arranged at the upper part of the signal spring plate 4, the U-shaped opening is arranged at the upper part, so that the signal spring plate 4 is conveniently arranged below the sliding block 51, the sliding block 51 slides in the U-shaped opening after being stressed, the contact part 512 on the sliding block 51 and the signal spring plate 4 can be ensured to have good contact electrical conduction, under the same principle, the through hole 40 can also be a U-shaped opening arranged at the lower part of the signal spring 4 or a through hole arranged at the middle part of the signal spring 4 according to the position of the slide block 51.

In a further improvement, the PTC7 and the three-pole discharge tube 6 are simultaneously disposed at one end of the trip mechanism 5 or are correspondingly disposed at two ends of the trip mechanism 5, and there are various arrangement manners, for example, as shown in fig. 1, the PTC7, the three-pole discharge tube 6, the trip mechanism 5, and the alarm device 2 are sequentially disposed in the housing 1 from left to right, and the front portion of the slider 51 is located at the right; as shown in fig. 6, the arrangement is that the PTC7, the trip mechanism 5, the three-pole discharge tube 6 and the alarm device 2 are arranged in the housing 1 from left to right in sequence, and the front part of the slide block 51 is positioned at the left; as shown in fig. 7, the three-pole discharge tube 6, the trip mechanism 5, the PTC7 and the alarm device 2 are arranged in the housing 1 from left to right in sequence, and the front part of the slider 51 is positioned at the right; as shown in fig. 8, the trip device 5, the three-pole discharge tube 6, the PTC7, and the alarm device 2 are disposed in the housing 1 in this order from left to right, and the front portion of the slider 51 is located on the left. Therefore, the protection of the circuit can be achieved by using different arrangement modes according to the requirements through the same principle.

In a further modification, as shown in fig. 3 and 4, the welding portion 500 and the ground electrode 60 of the triode discharge tube 6 both penetrate out of the first slide groove 30, the width of one end of the first slide groove 30 corresponding to the ground electrode 60 of the triode discharge tube 6 is smaller than that of the other end of the first slide groove 30, and the length of the other end of the first slide groove 30 is larger than that after the spring 52 is released. In such welding, the first chute 30 has a relatively narrow side corresponding to the welded end, so that the welded portion 500 between the three-pole discharge tube 6 and the rotor plate 50 can be firmly welded in the first chute 30, once the solder is melted, the rotor plate 50 can be conveniently moved to the relatively wide side under the resilience of the spring 52, so that the moving smoothness of the rotor plate 50 is ensured, meanwhile, the length of the relatively wide side of the first chute 30 is greater than the length of the released spring 52, so that the spring 52 can be completely released, and after the rotor plate 50 is disconnected from the grounding electrode 60 of the three-pole discharge tube 6, the moving cannot be hindered, and the complete disconnection of the grounding circuit is ensured.

In a further improvement, as shown in fig. 1 to 3 and 6 to 8, two ground spring plates 31 serving as ground wires are arranged on the circuit of the circuit board 3, and the moving plate 50 is clamped between the two ground spring plates 31 in a compressed state of the spring 52, so that good grounding of the whole circuit is ensured. The circuit board 3 is a PCB board with 4 layers, the density of the PCB board with 4 layers is high, the volume is small, the circuit board is convenient to use, the PTC7, the external elastic pieces 8 and the connecting reeds 9 are arranged in two, and the two external elastic pieces 8 and the two connecting reeds 9 are symmetrically arranged, so that the area of mutual contact among all the parts can be enlarged, good contact is ensured, and the problem that the alarm device 2 cannot be conducted when the contact with small area is bad is avoided.

In a further improvement, as shown in fig. 1 to 8, the alarm device 2 is a light emitting diode disposed on the circuit board 3, the light emitting diode is turned on and emits light after the sliding block 51 abuts against the signal spring 4, and the housing 1 is provided with a window 10 through which light of the light emitting diode passes. The light emitting diode can make people visually see the place of the fault, so that the danger is avoided.

In a further improvement, as shown in fig. 1 to 8, an insulating inner frame 11 is provided in the outer shell 1, the inner frame is engaged with the outer shell, the circuit board 3 is located at the bottom of the inner frame 11, and the signal spring 4, the tripping mechanism 5, the triode discharge tube 6, the PTC7, the outer spring 8, and the connection spring 9 are all embedded in the inner frame. The inner frame body 11 can be provided with a plurality of parts separated by the partition boards according to the arranged parts, the hole grooves are formed in the partition boards to realize the conduction between the parts needing to be conducted, the parts are separated to facilitate the installation, the installation of the parts can be firmer, and the problems that the products are poor in contact, and dangerous or short-circuited due to the conduction with the shell are avoided.

In a further modification, as shown in fig. 4, the welding portion 500 and the ground electrode 60 of the three-pole discharge tube 6 are welded and connected at the bottom of the circuit board 3, and the alloy solder is a soft solder. The welding point sets up at the back of circuit board 3, and other parts are arranged in the front of circuit board 3, have avoided being stained with the surface of other parts and cause the abnormal phenomenon when the solder melts, have also made things convenient for the welding equipment of product simultaneously. The alloy solder is soft solder. The solder ensures that the solder does not affect the shapes of the moving plate and the intermediate plate when melted, and thus does not affect the trip operation of the trip mechanism 5.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.

Claims (10)

1. A novel XDSL over-current and over-voltage protection device is characterized in that: the circuit board circuit is provided with a signal spring plate, a tripping mechanism, a three-pole discharge tube and a PTC; the tripping mechanism comprises a moving plate, a sliding block and a spring, wherein one end of the spring is fixedly connected with the sliding block, the other end of the spring is fixed in the shell, the moving plate is connected with a ground wire of the circuit board, one end of the moving plate penetrates out of the spring and is fixedly connected with the sliding block, the other end of the moving plate extends to form a welding part, and the welding part penetrates out of the first sliding groove and can move in the first sliding groove through the expansion and contraction of the spring; the welding part is welded and connected with the grounding electrode of the tripolar discharge tube in a spring compression state through alloy solder, and the alloy solder can be melted under the heat generated by discharge of the discharge tube; the front end of the sliding block in the shell is provided with an outer line elastic sheet electrically connected with an outer line, the outer line elastic sheet is electrically communicated with the circuit board through contact with a connecting reed arranged on the circuit board in a spring compression state, and the sliding block abuts against the signal elastic sheet after the spring is released, so that the alarm device is switched on to give an alarm and the connection between the outer line elastic sheet and the connecting reed is disconnected.

2. A novel XDSL overcurrent and overvoltage protection device as claimed in claim 1, wherein: the slider is a T-shaped slider with the front width smaller than the rear width, the rear width of the slider is matched with the width of the shell, a second chute sleeved outside the end part of the connecting reed is arranged at the front part of the slider, the slider slides relative to the connecting reed along the second chute under the action of the elastic force of the spring, an inclined plane convenient for the disconnection of the outer line elastic sheet is arranged at the front end of the slider, a contact part positioned on the surface of the rear part is arranged at the junction of the front part and the rear part of the slider, and the signal elastic sheet is arranged on the circuit board facing the contact part and is provided with a through hole capable of enabling the front part of the slider.

3. A novel XDSL overcurrent and overvoltage protection device as claimed in claim 1, wherein: the electrode pins of the three-pole discharge tube are square.

4. A novel XDSL overcurrent and overvoltage protection device as claimed in claim 1, wherein: the PTC and the tripolar discharge tube are simultaneously arranged at one end of the tripping mechanism or are correspondingly arranged at two ends of the tripping mechanism.

5. A novel XDSL overcurrent and overvoltage protection device as claimed in claim 1, wherein: welding part and tripolar discharge tube's earthing electrode all wear out from first spout, the width that first spout corresponds tripolar discharge tube earthing electrode one end is less than the width of the first spout other end, and the length of the first spout other end is greater than the length after the spring release.

6. A novel XDSL overcurrent and overvoltage protection device as claimed in claim 1, wherein: the circuit board circuit is provided with two ground wire spring pieces serving as ground wires, and the moving piece is clamped between the two ground wire spring pieces in a spring compression state.

7. A novel XDSL overcurrent and overvoltage protection device as claimed in claim 1, wherein: the warning device is a light emitting diode arranged on the circuit board, the light emitting diode is conducted to emit light after the sliding block abuts against the signal elastic sheet, and the shell is provided with a window through which light of the light emitting diode penetrates.

8. A novel XDSL overcurrent and overvoltage protection device as claimed in claim 1, wherein: the shell is internally provided with an insulated inner frame body which is matched and clamped with the shell, the circuit board is positioned at the bottom of the inner frame body, and the signal elastic sheet, the tripping mechanism, the three-pole discharge tube, the PTC, the outer wire elastic sheet and the connecting reed are all embedded in the inner frame body.

9. A novel XDSL overcurrent and overvoltage protection device as claimed in claim 1, wherein: the welding part and the grounding electrode of the tripolar discharge tube are welded and connected at the bottom of the circuit board, and the alloy solder is soft solder.

10. A novel XDSL overcurrent and overvoltage protection device as claimed in claim 1, wherein: the circuit board is a 4-layer PCB, the PTC, the external elastic pieces and the connecting reeds are all provided with two, and the two external elastic pieces and the two connecting reeds are symmetrically arranged.

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