CN107039960A - One kind masking insulated type surge protection device - Google Patents

Abstract

The invention discloses a kind of masking insulated type surge protection device for surge protection, including Zhe Hu mechanisms, thermal response switch component, voltage-sensitive component and the base played a supportive role being made up of retaining device, dropout swing arm and elastic component.When this surge protection device is because of the factor quick acting such as surge on circuit, caused short circuiting arc when can reliably interdict thermal response switch action disengaging, it is ensured that protection device departs from circuit completely.

Description

One kind masking insulated type surge protection device

Technical field

The present invention relates to a kind of surge protection device, particularly a kind of masking insulated type surge protection device.

Background technology

Surge protection device is the electronic circuit protection device for suppressing surge overvoltage, and it is that power-supply system and electronic equipment surge are anti- Effective surge protection means in shield.

Existing surge protection device, it generally uses the form of square metal piece vertical voltage sensing element plane, such as China specially Sharp number 201210302174.4 disclose it is a kind of can secondary dropout surge protector and Chinese patent number 201420741083.5 disclose the design of the hot release unit of surge protector, and this kind of electrode stretches out mode air contact area greatly, Easy heat radiation, and because without intermittent current function, releasing mechanism needs moving long distance to cut off the electricity supply, it is ensured that produced in its arcing action Raw arc extinction, the potential safety hazard for causing power supply and protection device failure to depart from.In practice due also to acting on square metal piece On machinery depart from the vertical direction that stress is sheet metal solder side, when causing such surge protection device operation work fault rate compared with Height, easily causes power supply and equipment breakdown.

The content of the invention

It is an object of the invention to overcome the shortcomings of that above prior art is present to cover insulated type surge protection device there is provided one kind. When power supply and protection device failure depart from, its thermal response switch component energy quick acting departs from power supply, and Zhe Hu mechanisms realize complete Insulation screening is gone out electric arc, plays the purpose of protection power supply and equipment safety.

To achieve these goals, present invention employs following technical scheme：

The present invention provides a kind of masking insulated type surge protection device, including Zhe Hu mechanisms, thermal response switch component, voltage-sensitive Component and the base played a supportive role.Zhe Hu mechanisms are made up of retaining device, dropout swing arm and elastic component；Thermal response switch component It is made up of movable copper sheet, flexible conductor, first electrode leading foot and second electrode leading foot；Voltage-sensitive component is by least one electricity Pressure-sensitive sensing unit composition.Base is provided with chamber, slot and middle part breach.Cavity bottom is provided with least one pillar, plays auxiliary Support the effect of voltage sensitive element.

Retaining device is arranged on base, provided with perforation, insulation tank, dislocation slope, rotating shaft, fixed mount, at least one on retaining device Individual boss, at least one binding clip and dividing plate.Dividing plate is arranged between perforation and flexible conductor, to prevent flexible conductor by external carbuncle Deform upon and be connected with the electric conductor in perforation and cause failure.Insulation tank is rearranged by one or more independent grooves, and And insulation tank is located at around perforation.When the solder side of fault reconstruction streaks insulation tank, fusing thereon can be will be attached to Solder residue, which strikes off, to be stored in these grooves, forms spacer insulator, prevents, because solder wire drawing continues turning circuit, to be used as first Weight insulation measures.

Voltage sensitive element is piezo-resistance or discharging gap or discharge tube, and its two end electrodes is provided with metal electrode film, one of them Metal electrode film is provided with electrode column, and another metal electrode film is provided with second electrode.Binding clip is positive from retaining device Edge show that one of binding clip, which is provided with, can accommodate second electrode simultaneously to the vertical direction extension of plane where the retaining device back side The groove stretched out is allowed to, plays stationary positioned second electrode.

Voltage sensitive element is fixedly mounted in chamber by binding clip, and electrode column, through perforation, second electrode passes through recessed Groove stretches out plane where retaining device front, to ensure that the operating space that second electrode is connected with miscellaneous part is sufficient.On electrode column Plane where solder side and retaining device front is into same plane.Due also to the inhibition of pillar and boss, chamber bottom surface with It can form corresponding with pillar and boss height respectively between voltage sensitive element and between the retaining device back side and voltage sensitive element Gap；

Circular hole on movable copper sheet is enclosed in rotating shaft, and movable copper sheet can be swung around the shaft, the top solder side and electrode of movable copper sheet Solder side on post is equipped with groove, and the contact area of the more smooth solder side solder of the solder side provided with groove is bigger, can hold The natural stress received is also bigger, can also prevent problem of faulty soldering to a certain extent, is additionally provided with the top solder side of movable copper sheet Welding hole, to facilitate charging to weld.

Dropout swing arm is provided with the electric arc baffle board and thrust plate for being used for interdicting electric arc.When the circular hole in dropout swing arm is enclosed in rotating shaft When, the thrust plate of dropout swing arm leans against movable copper sheet side along upper, dropout swing arm bottom inner wall sleeve in movable copper sheet bottom side edge along upper, Movable copper sheet can around the shaft be swung with dropout swing arm.Again because dropout swing arm bottom inwall gives a restraining force of movable copper sheet bottom Effect, movable copper sheet can up or down be tilted by the mechanical stress in addition to self gravitation and agitate action using rotating shaft as basic point.

Perforation and insulation tank can be completely covered into same plane in plane where electric arc baffle board bottom surface and retaining device front. When disengaging is acted, its second heavy insulation measures gone out and connected between electric arc and isolation activity copper sheet and electrode column as hiding.

Electric arc baffle board bottom surface is rearranged provided with masking groove, masking groove by one or more independent grooves.When electric arc blocking When plate bottom surface is taken exercises, it covers groove and cooperated with insulation tank, strikes off the excess solder stored on its plane of movement, prevents Solder, which is squeezed, splashes into silk composition potential safety hazard, is used as triple insulation measures.

Dislocation slope can be arranged to constitute certain lifting upwards or the downwards slopes of steep drop angle with the plane where retaining device front, And the slope that misplaces is located at perforation and insulation tank opposite direction position, it is ensured that the solder side of movable copper sheet is through a series of above-mentioned insulation measures Afterwards, then by the effect of dislocation slope, certain angle is tilted up or down by basic point of rotating shaft, makes to put down where the solder side of movable copper sheet Face and the solder side Special composition dislocation insulation of the plane where retaining device front, i.e. electrode column, are used as quadruple insulation measures.

Elastic component one end is leaned against on fixed mount, and the other end is leaned against in dropout swing arm, and offer elasticity can be swung around the shaft for dropout swing arm Stress.

The present invention further illustrates that the plane where above-mentioned retaining device front refers to perforation where the positive hole side of retaining device Plane.

The present invention further illustrates that dropout swing arm also has the function that working condition is indicated and remote signalling is alerted.Dropout swing arm is provided with Indicator board and projection, indicator board from the first end on the outside of base top can turn to the second end with dropout swing arm, at the same projection also with Dropout swing arm blocks or staggered middle part breach.When using surge protection device in the power supply system, the two ends of flexible conductor pass through metal Solder or the mode of spot welding form the connection of electricity with movable copper sheet and first electrode leading foot respectively；The top weldering of movable copper sheet Junction welds the connection to form electricity by the solder side on fusible metal alloy solder and electrode column；Second electrode leading foot passes through gold The mode of the welding of category solder or spot welding forms the connection of electricity with second electrode；First electrode leading foot and second electrode leading foot A part be separately fixed on two slots of base, another part is extended outside the base by the breach on slot, and by two Electrode lead-out pins extension is connected on phase line and the neutral conductor or ground wire.So as to thermal response switch component and voltage-sensitive group Part is connected and forms normally closed switch, now first end of the indicator board on the outside of base top, and projection just blocks middle part breach, i.e., For normal operating conditions.If voltage sensitive element is made because of the leakage current that the power frequency short circuit current flow on circuit and its shelf-life aging are produced Into voltage sensitive element temperature rise, this temperature is delivered on electrode column, promotes to adhere to fusible metal alloy solder fusing thereon, Dropout swing arm rotates around the axis under the screen resilience effect of elastic component, forces the top of active copper piece to be welded under the promotion of thrust plate Face is moved and separated with the solder side on electrode column, and the top solder side of movable copper sheet is through insulation tank, masking groove and the effect of dislocation slope Insulation spacing and spatial offset are formd between electrode column afterwards, last electric arc baffle board bottom surface will perforate and insulation tank is completely covered, Thorough isolation activity copper sheet is contacted with electrode intercolumniation, and now indicator board turns to the second end from the first end on the outside of base top, Complete a mechanical working condition switching.In practice, surge protection device also has shell, positioned at the status window of shell It may be provided at its optional one end, and a kind of eye-catching color coated to indicator board outer surface, when indicator board from first end turns to the During two ends, color change can be observed from status window, so as to represent voltage sensitive element malfunction and failure；Meanwhile, if User triggers the switch that middle part breach is passed through on mounting plate using above-mentioned projection, when dropout swing arm is rotated, and originally seals Stifled middle part breach is staggered with the projection that press against the button of switch with middle part breach, the button of switch is suffered oppression, is then switched State changes immediately, so as to send out remote signals by electric signal.

Chamber is five face closure formulas, when the retaining device is fixed on base, and chamber is tetragonal into steam vent and charge door.When Moistureproof, anti-fire-retardant filling is carried out by charge door with potting compounds such as such as liquid-state epoxy resins or organosilicon to voltage sensitive element and chamber Feng Shi, because of the balanced chamber atmospheric pressure throughout the room of the scavenging action of steam vent, enables liquid potting compound to permeate completely, fill often Gap at one, and in the absence of potting compound extravasation problem.

Compared with prior art, the advantage that the present invention is present：

The band of the present invention covers the hot releasing mechanism of the surge protection device of insulation function by the way of departing from along face tangential direction, The relatively general mode departed from along face vertical direction more can effectively suppress electric arc, and security and stability is stronger；Voltage sensitive element is used to take off From electrode use column, the form less easy heat radiation of relatively general vertical square piece and heat conduction is more concentrated, it is ensured that the reliability that heat departs from； By multiple blocking insulation measures such as electric arc baffle board, masking groove, insulation tank and dislocation slopes, receive except excess solder and form space Dislocation insulation, this is not available for general surge protector, more effectively to be avoided the electric arc because caused by departing from heat from causing surge The hidden danger of the secondary conducting of protection device, improves the security of power supply and equipment operation.

Brief description of the drawings

Fig. 1 disassembles schematic diagram for the structure of surge protection device in the present invention；

Fig. 2 is the positive structure schematic of retaining device in the present invention；

Fig. 3 is the structure schematic diagram of retaining device in the present invention；

Fig. 4 is that dislocation slope lifting in the present invention or steep drop function setting mode visualize schematic diagram；

Fig. 5 is the structure schematic diagram of dropout swing arm in the present invention；

Fig. 6 is the maintenance combination diagram of retaining device, movable copper sheet and voltage sensitive element in the present invention；

Fig. 7 acts pre-structure schematic diagram for the disengaging of surge protection device in the present invention；

Fig. 8 is structural representation after the disengaging action of surge protection device in the present invention；

Fig. 9 is Fig. 8 section visualization structural representation.

Reference：1- retaining devices, 1a- retaining devices front, the 1b- retaining devices back side, 2- voltage sensitive elements, 2a- electrode columns, 2b- second electrodes, 3- bases, 3a- chambers, 3b- first ends, the ends of 3c- second, 3d- pillars, 4- activity copper sheets, 4a- activities Copper sheet bottom, 5- dropout swing arms, 5a- dropout swing arms bottom inwall, 6- elastic components, 7- flexible conductors, 8- first electrode leading foots, 9- second electrode leading foots, 11- perforation, 12- insulation tanks, 13- dislocation slope, 14- rotating shafts, 15- fixed mounts, 16- boss, 17- Breach in the middle part of binding clip, 17a- grooves, 18- dividing plates, 31- slots, 32-, 33- steam vents, 34- charge doors, 51- electric arcs Baffle board, 51a- masking grooves, 51b- electric arc baffle boards bottom surface, 52- thrust plates, 53- indicator boards, 54- projections.

Embodiment

The present invention is described in more detail with reference to the accompanying drawings and detailed description, but protection scope of the present invention is not only Following preferred embodiment is confined to, it is every to strengthen the technical side of current interruption insulation effect by Zhong Zhe arcs mechanism of the present invention Case, all within protection scope of the present invention；Surge protection device is to voltage sensitive element, elastic component and flexible conductor in the present invention Material type be not limited, in the following specific embodiments, with voltage sensitive element 2 be pressure cell 2, elastic component 6 For torsion spring 6, exemplified by flexible conductor 7 is soft copper wire 7, described in detail the structure of surge protection device of the present invention.

In described preferred embodiment, as shown in figure 1, a kind of masking insulated type surge protection device, including Retaining device 1, piezo-resistance 2, base 3, movable copper sheet 4, dropout swing arm 5, torsion spring 6, soft copper wire 7, first electrode are drawn Go out pin 8 and second electrode leading foot 9.Piezo-resistance 2 is prior by preparing, and two metal electrode films are passed through soft soldering Mode is welded in positive and negative two silver electrode surfaces of pressure cell 2, has cylinder on the surface of one of metal electrode film The electrode column 2a of shape, electrode column 2a solder side are not smooth, but with groove feature；Another metal electrode film from The part for extending bending stretching in plane forms second electrode 2b；The chamber 3a of base 3 is five face closure formulas, and its middle part has Chamber 3a, is provided with slot 31 in the bottom left and right sides of base 3, square middle part breach 32 is additionally provided with the middle of bottom.Chamber Room 3a bottoms are additionally provided with equally distributed five columned pillar 3d, the high 1mm of pillar 3d.

As shown in Figures 2 and 3, provided with perforation 11 on retaining device 1, in retaining device front, 1a is additionally provided with is arranged in by three Insulation tank 12 that the arc-shaped trench of the periphery of perforation 11 are constituted, it is located at perforation 11 and the dislocation of the opposite direction position of insulation tank 12 Slope 13, the rotating shaft 14 for being located at retaining device front 1a lower ends center, be located at retaining device front 1a lower ends fixed mount 15 to the left with And it is located at the dividing plate 18 of retaining device front 1a Left-side centers；At the retaining device back side 1b be additionally provided with equally distributed five it is columned Boss 16 and extend from retaining device front 1a both sides center edge along the vertical direction to plane where the 1b of the retaining device back side Two binding clips 17, wherein also being dug on the binding clip 17 on the right side of the 1a of retaining device front has and can accommodate second electrode 2b Groove 17a.The described groove of insulation tank 12 depth 0.5mm.The high 1mm of boss 16.

As shown in figure 4, described dislocation slope 13 can be designed to upward lifting or the form dropped suddenly downwards, thus in embodiment Plane where described retaining device front 1a refers to perforation 11 in the plane where retaining device front 1a hole side.And this implementation The form of dislocation slope 13 of upward lifting, plane 2mm where retaining device front 1a is risen out on the dislocation slope of slope 13 are employed in example.

As shown in figure 5, dropout swing arm 5 is provided with indicator board 53, the lower section of indicator board 53 is provided with the electric arc baffle board of class round pie 51 and the thrust plate 52 that extends vertically out, projection 54 is additionally provided with dropout swing arm bottom 5 and for movable copper sheet bottom 4a applies the dropout swing arm bottom inwall 5a of restraint stress.It is additionally provided with electric arc baffle board bottom surface 51b by arc deep a plurality of 0.5mm The masking groove 51a that shape groove is rearranged,

As shown in fig. 6, pressure cell 2 is fixedly mounted in retaining device 1 by two binding clips 17, now, due to boss 16 inhibition, can form 1mm gap between retaining device back side 1b and pressure cell 2, and electrode column 2a can be worn Perforation 11 is crossed, now, its solder side and retaining device front 1a place plane are into same plane；Second electrode 2b passes through groove 17a The plane stretched out where retaining device front 1a.Movable copper sheet bottom 4a circular hole is enclosed in rotating shaft 14, for convenience of assembling, preferably , the solder side position of the top tow sides of movable copper sheet 4 is equipped with groove, and welding hole is additionally provided with its solder side, in weldering When connecing, the solder side of movable copper sheet 4 14 is swung into the position relative with electrode column 2a solder side around the shaft, meltable gold is used Category solder forms the connection of electricity by the solder side of the welding hole on its solder side and electrode column 2a.Only need pressure cell 2, consolidate Position device 1 and movable copper sheet 4 can complete to depart from the welding of electrode, so as to optimize production distribution, realize welding operation space Maximize.

As shown in fig. 7, retaining device 1 by the binding clip 17 on both sides as stated above by the pressure cell 2 being welded, activity The maintenance combination of copper sheet 4 is fixedly mounted in the chamber 3a at the center of base 3, due to pillar 3d inhibition, in chamber 3a 1mm gap can be formed between bottom surface and piezo-resistance 2；The one end of torsion spring 6 is leaned against on fixed mount 15, and the other end leans against dropout pendulum On arm 5, in compressive state；The bottom circular hole of dropout swing arm 5 is enclosed in rotating shaft 14, while dropout swing arm bottom inwall (5a) covers On movable copper sheet bottom 4a edges, movable restraining force of copper sheet bottom (4a) is given, now thrust plate 52 leans against activity On the left side edge of copper sheet 4, the clockwise power lasting to movable copper sheet 4 one, and electric arc baffle board bottom surface 51b is with consolidating Plane is into same plane where the device front 1a of position, and indicator board 53 is still in the first end 3b of the top outer of base 3, projection 54 Just block middle part breach 32；Drawn respectively with movable copper sheet 4 and first electrode by way of spot welding at the two ends of soft copper wire 7 Pin 8 forms the connection of electricity；Second electrode leading foot 9 and second electrode 2b forms the connection of electricity by way of spot welding；First electricity The fore-end of pole leading foot 8 and second electrode leading foot 9 is separately fixed on the slot 31 on the both sides of base 3, and another part leads to Cross breach on slot 31 to stretch out outside base 3, so that thermal response switch component is connected with voltage-sensitive component and forms normally closed switch. When using surge protection device in the power supply system, two described electrode lead-out pins are connected to phase line and the neutral conductor or ground On line, if the piezo-resistance 2 caused by the leakage current that the power frequency short circuit current flow on circuit and its shelf-life aging are produced of piezo-resistance 2 Temperature rise, this temperature is delivered on electrode column 2a, promotes to adhere to fusible metal alloy solder fusing thereon, and dropout swing arm 5 exists 14 rotated clockwise around the shaft under the screen resilience effect of torsion spring 6, force active copper piece 4 to push up under the impetus of thrust plate 52 The solder side at end is moved and separated with electrode column 2a solder side, and the solder side of movable copper sheet 4 is through insulation tank 12, masking groove 51a And insulation spacing and spatial offset, last electric arc baffle board bottom surface 51b are formd between electrode column 2a after the effect of dislocation slope 13 Perforation 11 and insulation tank 12 are completely covered, as shown in figure 8, thoroughly contacting between isolation activity copper sheet 4 and electrode column 2a, Indicator board 53 turns to the second end 3c from the first end 3b on the outside of the top of base 3 and is obstructed static simultaneously, and this completes one Individual mechanical working condition switching.In practice, surge protection device also has shell, and the status window positioned at shell can be set A kind of eye-catching color is coated in its optional one end, and to the outer surface of indicator board 53, it is such as red.When indicator board 53 is from first end When 3b turns to the second end 3c, color change can be observed from status window, so as to represent the malfunction and failure of piezo-resistance 2； Meanwhile, if user triggers the switch that middle part breach 32 is passed through on mounting plate using projection 54, when 5 turns of dropout swing arm When dynamic, originally closure middle part breach 32 is staggered with the projection 54 that press against the button of switch with middle part breach 32, no longer makes switch Button suffers oppression, then the state switched changes immediately, so as to send out remote signals by electric signal.

As shown in figure 9, when the retaining device 1 is fixed in chamber 3a, chamber 3a tetra- jiaos of formation, three steam vents 33 and one Individual charge door 34, can be by adding when needing to carry out piezo-resistance 2 and chamber 3a with organosilicon protection against the tide, anti-fire-retardant embedding Material mouth 34 is completed, and because atmospheric pressure in the balanced chamber 3a of the scavenging actions of three steam vents 33 everywhere, can be made organic Silicon permeates filling everywhere gap completely, and need not worry the problem of potting compound exosmoses.

Above-described embodiment be available to be familiar with person in the art realize or using the present invention, those skilled in the art can In the case where not departing from the innovation and creation thought of the present invention, various modifications or change, thus the present invention are made to above-described embodiment Protection domain do not limited by above-described embodiment, and should be the maximum magnitude for meeting the inventive features that claims are mentioned.

Claims (21)

1. one kind masking insulated type surge protection device, it is characterised in that：

Zhe Hu mechanisms, including retaining device (1), dropout swing arm (5) and elastic component (6)；

Thermal response switch component, including movable copper sheet (4), flexible conductor (7), first electrode leading foot (8) and second electrode Leading foot (9)；

Voltage-sensitive component, including at least one voltage sensitive element (2)；

Base (3), it supports the Zhe Hu mechanisms, the thermal response switch component and the voltage-sensitive component；

Wherein, the thermal response switch component is normally closed switch in working condition, and it connects with the voltage-sensitive component.

2. a kind of masking insulated type surge protection device according to claim 1, it is characterised in that：Described base (3) It is provided with chamber (3a), slot (31) and middle part breach (32)；Propped up in described chamber (3a) bottom provided with least one Post (3d).

3. a kind of masking insulated type surge protection device according to claim 2, it is characterised in that：Described retaining device (1) On base (3), provided with perforation (11), insulation tank (12), dislocation slope (13), rotating shaft on retaining device (1) (14), fixed mount (15), at least one boss (16) and at least one binding clip (17).

4. a kind of masking insulated type surge protection device according to claim 3, it is characterised in that：Described retaining device (1) dividing plate (18) is provided with, dividing plate (18) is arranged between the perforation (11) and the flexible conductor (7).

5. a kind of masking insulated type surge protection device according to claim 3, it is characterised in that：Described insulation tank (12) rearranged by one or more independent grooves, and insulation tank (12) is located at around the perforation (11).

6. a kind of masking insulated type surge protection device according to claim 3, it is characterised in that：Described dislocation slope (13) it is arranged to constitute upward lifting or the downwards slopes of steep drop angle with the plane where the retaining device positive (1a), and And dislocation slope (13) is located at the perforation (11) and the insulation tank (12) opposite direction position.

7. a kind of masking insulated type surge protection device according to claim 3, it is characterised in that：Described voltage is quick Sensing unit (2) two end electrodes, which are provided with metal electrode film, one of metal electrode film, electrode column (2a), another metal There is second electrode (2b) on electrode slice.

8. a kind of masking insulated type surge protection device according to claim 7, it is characterised in that：Described anchorage clip Plate (17) is to extend from the edge of the retaining device positive (1a) to the vertical direction of plane where the retaining device back side (1b) Go out, one of binding clip (17) is provided with the groove (17a) that can be accommodated the second electrode (2b) and be allowed to stretch out.

9. a kind of masking insulated type surge protection device according to claim 7, it is characterised in that：Described electrode column Solder side on (2a) is provided with groove.

10. a kind of masking insulated type surge protection device according to claim 8, it is characterised in that：Described voltage is quick Sensing unit (2) is fixedly mounted in the chamber (3a), and the electrode column (2a) and the second electrode (2b) Stretch out plane where the retaining device positive (1a).

11. a kind of masking insulated type surge protection device according to claim 7 or 9, it is characterised in that：Described electricity Solder side on pole (2a) and the plane where the retaining device positive (1a) of the retaining device (1) are into same plane.

12. a kind of masking insulated type surge protection device according to claim 7, it is characterised in that：Described active copper Circular hole on piece (4) is enclosed in the rotating shaft (14), and movable copper sheet (4) (14) can swing around the shaft, movable copper sheet (4) Top solder side be provided with groove and welding hole, its solder side passed through on fusible metal alloy solder and the electrode column (2a) is welded Connect the connection to form electricity.

13. a kind of masking insulated type surge protection device according to claim 3, it is characterised in that：Described dropout pendulum Arm (5) is provided with electric arc baffle board (51) and thrust plate (52)；Circular hole in dropout swing arm (5) is enclosed on the rotating shaft (14) On, while dropout swing arm bottom inwall (5a) is also enclosed on movable copper sheet bottom (4a) edge, dropout swing arm (5) Thrust plate (52) lean against movable copper sheet (4) side along upper, movable copper sheet (4) can be with dropout swing arm (5) around the shaft (14) Swing.

14. a kind of masking insulated type surge protection device according to claim 13, it is characterised in that：Described dropout Swing arm bottom inwall (5a) is enclosed on movable copper sheet bottom (4a) edge, and movable copper sheet (4) can be by addition to self gravitation Mechanical stress, is tilted and agitates action up or down with the rotating shaft (14) for basic point.

15. a kind of masking insulated type surge protection device according to claim 13, it is characterised in that：Described dropout Swing arm (5) is provided with indicator board (53) and projection (54)；The indicator board (53) can be with the dropout swing arm (5) from institute State the first end (3b) on the outside of base (3) top and turn to the second end (3c), while the projection (54) is also put with threading off Arm (5) is blocked or the middle part breach (32) of staggering.

16. a kind of masking insulated type surge protection device according to claim 13, it is characterised in that：Described electric arc Described wear can be completely covered into same plane in plane where baffle board bottom surface (51b) and the retaining device positive (1a) Hole (11) and the insulation tank (12)；Electric arc baffle board bottom surface (51b) is provided with masking groove (51a), masking groove (51a) Rearranged by one or more independent grooves.

17. a kind of masking insulated type surge protection device according to claim 3, it is characterised in that：Described elastic component (6) one end is leaned against on the fixed mount (15), and the other end is leaned against on the dropout swing arm (5).

18. a kind of masking insulated type surge protection device according to claim 1, it is characterised in that：Described flexible conductor (7) drawn respectively with the movable copper sheet (4) and the first electrode by way of metal alloy solder or spot welding at two ends The connection of pin (8) formation electricity；Described second electrode leading foot (9) metal alloy solder weld or spot welding by way of with The connection of second electrode (2b) the formation electricity of the voltage sensitive element (2)；Described first electrode leading foot (8) and A part for two electrode lead-out pins (9) is separately fixed on two slots of the base (3) (31), and another part passes through Breach on slot (31) stretches out base (3) outside.

19. a kind of masking insulated type surge protection device according to claim 2, it is characterised in that：Described chamber (3a) For five face closure formulas, when the retaining device (1) is fixed on base (3), chamber (3a) is tetragonal into steam vent (33) With charge door (34).

20. a kind of masking insulated type surge protection device according to claim 1, it is characterised in that：Described voltage is quick Sensing unit (2) can be constituted with least one piezo-resistance.

21. a kind of masking insulated type surge protection device according to claim 1, it is characterised in that：Described voltage is quick Sensing unit (2) can be constituted with least one discharge tube or discharging gap.