CN103580019A - Surge protection device for circuit board - Google Patents

Surge protection device for circuit board Download PDF

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Publication number
CN103580019A
CN103580019A CN201210281721.5A CN201210281721A CN103580019A CN 103580019 A CN103580019 A CN 103580019A CN 201210281721 A CN201210281721 A CN 201210281721A CN 103580019 A CN103580019 A CN 103580019A
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China
Prior art keywords
shell
elastic plastic
discharge tube
circuit board
gas discharge
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Application number
CN201210281721.5A
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Chinese (zh)
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CN103580019B (en
Inventor
任华山
徐祝勤
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菲尼克斯亚太电气(南京)有限公司
菲尼克斯电气(南京)研发工程中心有限公司
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Priority to CN201210281721.5A priority Critical patent/CN103580019B/en
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Abstract

The invention provides a surge protection device for a circuit board. The surge protection device comprises an outer shell and a bottom cover. Metal oxide varistors, a gas discharge tube, a guide wire, an insulation shell, a spring, a current separating strip, a thermal tripping point, an elastic plastic piece and a microswitch are arranged in the outer shell. Insulation materials are used for isolating any two elements, and the current separating strip is connected with the gas discharge tube through a soft copper cable. Two or more MOVs are arranged to be stacked vertically, and electrodes on the opposite side faces are welded to the corresponding current separating strip respectively through low-temperature soldering tins. The gas discharge tube and the elastic plastic piece are placed between the two MOVs, and the entire structure is arranged to be in vertical and horizontal approximate symmetry. When any MOV is overloaded so that an electrode of the thermal tripping point and the current separating strip can be separated, the microswitch can act and output signals outwards, products are made to achieve a better protecting level, and the fact that terminal equipment is not damaged due to overvoltage is guaranteed.

Description

Surging prevention device for circuit board
Technical field
The present invention and a kind of surging prevention device, the particularly a kind of surging prevention device that can protect pcb board power supply circuit.
Background technology
Along with electronic component is more and more to miniaturization, integrated development, limited in area space for high-density arrangement element circuitry plate, especially, the in the situation that in short transverse, restriction being very large, this traditional structure can not meet the development need of prior art far away.In order to meet, power source integral is integrated, the needs of volume miniaturization, maximizes power; Phoenix carries out brand-new design to conventional power source class surging prevention device; past, relevant large through-flow power supply surging prevention device was used for guide tracked installation form; and on circuit board with being also little through-flow form; mostly adopt piezo-resistance, gas discharge tube or TVS diode element to be directly welded on circuit board; there is no hot tripping function, more there is no remote signaling function.
Therefore,, in order better to address the above problem, adopt the final purpose that following technical proposals is this paper.
Summary of the invention
The object of the technical program is to overcome the deficiencies in the prior art; in order to meet, power source integral is integrated, the needs of volume miniaturization, maximizes power; to carry out brand-new design to conventional power source class surging prevention device; design a kind ofly for power lightning protection circuit board surging prevention device, make it avoid the damage that thunder and lightning induction voltage, power supply interference, static discharge etc. cause.
The object of the technical program, will be achieved by the following technical programs:
For the surging prevention device of circuit board, the design of threading off of its compact structure and multiple spot heat comprises in a shell and bottom, described shell and is provided with piezo-resistance, gas discharge tube, cable, insulation shell, spring, separated current bar, hot trip point, elastic plastic member, sensitive switch.Between described any two components and parts, adopt insulating material isolation, the electrode of the opposite flank of two piezo-resistances respectively with corresponding separated current bar between low temperature scolding tin weld, described gas discharge tube embeds in the circular cavity of housing integrated molding, between described separated current bar and gas discharge tube, adopts copper flexible cable to be connected.It is characterized in that: described enclosure interior adopts two or the upper and lower lamination arrangement form of polylith piezo-resistance MOV, wherein, between two piezo-resistances, overall structure presents the spring top that left and right near symmetrical mode places and relies on its elastic force to hold separated current bar, the elastic plastic member that both sides have crooked symmetric arms and center ovalize cavity is socketed on the cylindrical axostylus axostyle being connected with shell, elastic plastic member can slide up and down around central fixed shaft, and and the contact of elastic plastic member and the moving contact close contact of sensitive switch.When there is overcurrent, overvoltage condition in circuit, discharge tube electric discharge makes pressure-sensitive overheated reaching after uniform temperature, any hot trip point conducts heat to hot trip point due to pressure-sensitive after overheated, hot trip point scolding tin melts, separated current bar is under the effect of Compress Spring, by the separated current bar in hot trip point and pressure-sensitive electrode separation, disconnect this path; Meanwhile, the deformation by elastic plastic member triggers sensitive switch action and will disconnect path signal and export to outside.
The application of the technical program structure, its outstanding effect shows as:
1, adopt alternate, the relative neutral line and multiple protective form over the ground, and the signal that heat is threaded off is exported to outside remote signalling by sensitive switch.
2, low residual voltage circuit, the protection level that can make product reach, guarantees that terminal equipment avoids overvoltage and damage.
3, main benefit is also: this small product size is less, highly shorter especially, and this design pin directly can be welded on circuit board, has the functions such as through-flow greatly, hot dropout, remote signalling; Meet existing industrial power Highgrade integration, miniaturization, maximizes power demand, fill up this product in the blank of the sector.
Below in conjunction with embodiment accompanying drawing, the specific embodiment of the present invention is done further to decompose, so that the technical program is easier to understand, grasp.
Accompanying drawing explanation
Fig. 1 is the side structure schematic diagram of technical solution of the present invention decomposing state.
Fig. 2 is the Facad structure schematic diagram of technical solution of the present invention decomposing state.
Fig. 3 is the circuit theory diagrams of technical solution of the present invention execution mode.
In figure, the implication of each Reference numeral is:
1-shell, 2-bottom, 3-piezo-resistance, 4-gas discharge tube, 5-cable, 6-insulation shell, the separated current bar of 7-, 8-spring, the hot trip point of 9-, 10-sensitive switch, 11-elastic plastic member.
Embodiment
Known in conjunction with Fig. 2 again with reference to figure 1; it is the surging prevention device for circuit board that the technical program proposes; it adopts phase top-stitching low residual voltage circuit protection form over the ground, and the signal that heat is threaded off is exported to outside remote signalling by sensitive switch, guarantees that terminal equipment avoids overvoltage and damage.Described circuit board comprises in a shell 1 and bottom 2, described shell and is provided with piezo-resistance 3, gas discharge tube 4, cable 5, insulation shell 6, separated current bar 7, spring 8, hot trip point 9, sensitive switch 10, elastic plastic member 11 with surging prevention device.Described enclosure interior adopts two or the upper and lower lamination arrangement form of polylith piezo-resistance MOV, between two piezo-resistances 3, overall structure presents spring 8 tops that left and right near symmetrical mode places and relies on its elastic force to hold separated current bar 7, between described any two components and parts, all adopt insulating material isolation, guaranteed the requirement of electric clearance and creepage distance.Be embedded in described housing inner side two piezo-resistances 3 corresponding side electrode respectively with corresponding separated current bar 7 between low temperature scolding tin weld, described gas discharge tube 4 embeds in the circular cavity of housing integrated molding, between described separated current bar 7 and gas discharge tube 4, adopt copper flexible cable 5 to be connected, the elastic plastic member 11 that both sides have crooked symmetric arms and center ovalize cavity is socketed on the cylindrical axostylus axostyle being connected with shell, elastic plastic member 11 can slide up and down around central fixed shaft, and and the contact of elastic plastic member and the moving contact close contact of sensitive switch.Wherein, when there is overcurrent, overvoltage condition in circuit, gas discharge tube 4 electric discharge makes that piezo-resistance 3 is overheated to be reached after uniform temperature, any hot trip point 9 is because piezo-resistance 3 conducts heat to hot trip point 9 after overheated, hot trip point 9 scolding tin melt, separated current bar 7, under the effect of Compress Spring 8, by the separated current bar in hot trip point 97 and piezo-resistance 3 electrode separation, disconnects this path; Meanwhile, the deformation by this elastic plastic member 11 triggers sensitive switch 10 actions and will disconnect path signal and export to outside.Be to cause hot trip point 9 electrodes separated with separated current bar 7 after any piezo-resistance 3 overloads, sensitive switch 10 can move and outside output signal.
Further, this lightning protection device external shell adopts technical grade flame-retardant insulating material, and its main material is the mixture of PC and ABS, through high-temperature injection, processes and is shaped to housing.Because this type of material has various shapes, shock-resistant, there is excellent toughness and plasticity, not easy fracture and distortion; Simultaneously again in this product use procedure and there is the electric property of safe insulation between circuit board, not only attractive in appearance but also safe and reliable.
Further, described shell 1 and the fixedly employing screwless buckle mode between bottom 2 design, between upper-lower casing, install many buckles and groove, not only firmly but also assembling simple and fast, the two ends design pin that is positioned at housing directly can be welded on circuit board, because this small product size is less, highly low, under limited steric requirements, can better install.
Further, described elastic plastic member 11 is that center cavity both sides have the working of plastics ,Qi center of symmetric arms to have oblong cavity body, and cavity is socketed on the cylindrical axostylus axostyle being connected with shell 1.Bilateral symmetry arm is to a direction bend relief, and the arm end points of projection is column type, and elastic plastic member 11 can slide up and down around central fixed shaft.Two brachiocylloosis initial part abut against on the plastics barrier section of intermediate openings, and described plastics barrier section limits the displacement of two arm occurred level directions of elastic plastic member 11, and the moving contact close contact of the contact of elastic plastic member 11 and sensitive switch 10.
The separated current bar 7 that described bilateral symmetry distributes, its one end is connected with de-stomion 9 soldered of heat, the other end is by copper flexible cable 5 and gas discharge tube 4 welding conductings, and the spring 8 that is positioned at the left and right sides of lower end is held respectively separated current bar 7 middle bent places.
Again further, described sensitive switch 10 contact elastic plastic members 11 and being fixed in a prefabricated rectangular channel of shell body 1, sensitive switch 10 tops are provided with moving contact, inside configures respectively one group and often opens and normally closed contact-making switch, by the closed of the movable percussion switch of moving contact with open, export two groups of different signals, for user, freely select signal source.
As shown in Figure 3, the present embodiment adopts isolation over the ground and the design of equipotential circuit, two groups of corresponding holding wires that connect of piezo-resistance 3 are to upper, and one group of ceramic gas discharge tube 4 two end electrodes is linked respectively phase adjacency pair holding wire to upper, and gas discharge tube 4 targets are connected to jointly to be gone up; When surge occurs, gas discharge tube 4 has been realized the electric discharge over the ground of surge, and simultaneously two groups of piezo-resistances 3 realize surge voltage, the electric current respectively organized between holding wire pair and suppress; During without high voltage surge, all piezo-resistances 3 and discharge tube 4 are rendered as high-impedance state, meet the requirement of circuit isolation.
This surging prevention device is for the power consumption equipment with power lightning protection function; adopt a large amount of pulse energy short circuits that lightning protection for power supply can produce because of lightning induction on release circuit within shortest time the earth of releasing; potential difference between each interface of reduction equipment, thereby the equipment in protective circuit.Require lightning protection device should meet the ability of security protection surge and anti-overvoltage, meet again communication system more and more to the requirement of miniaturization integrated direction development, therefore adopt design through-flow greatly, compact to adapt to following developing direction.
Finally it should be noted that, above is only one of concrete exemplary applications of the present invention, all can take the circumstances into consideration as the case may be to select to substitute components and parts, but the protection range of invention is not constituted any limitation in actual application.

Claims (8)

1. for the surging prevention device of circuit board, comprise in a shell and bottom, described shell and be provided with piezo-resistance, gas discharge tube, wire, insulation shell, spring, separated current bar, hot trip point, elastic plastic member, sensitive switch; Between described any two components and parts, all adopt insulating material isolation, the electrode of the opposite flank of two piezo-resistances respectively with corresponding separated current bar between low temperature scolding tin weld, described gas discharge tube embeds in the circular cavity of housing integrated molding, between described separated current bar and gas discharge tube, adopts copper flexible cable to be connected; It is characterized in that: described enclosure interior adopts two or the upper and lower lamination arrangement form of polylith piezo-resistance MOV, wherein, between two piezo-resistances, overall structure presents the spring top that left and right near symmetrical mode places and relies on its elastic force to hold separated current bar, the elastic plastic member that both sides have crooked symmetric arms and center ovalize cavity is socketed on the cylindrical axostylus axostyle being connected with shell, elastic plastic member can slide up and down around central fixed shaft, and and the contact of elastic plastic member and the moving contact close contact of sensitive switch; When there is overcurrent, overvoltage condition in circuit, discharge tube electric discharge makes pressure-sensitive overheated reaching after uniform temperature, any hot trip point conducts heat to hot trip point due to pressure-sensitive after overheated, hot trip point scolding tin melts, separated current bar is under the effect of Compress Spring, by the separated current bar in hot trip point and pressure-sensitive electrode separation, disconnect this path; Meanwhile, the deformation by elastic plastic member triggers sensitive switch action and will disconnect path signal and export to outside.
2. the surging prevention device for circuit board according to claim 1, is characterized in that: this lightning protection device external shell adopts technical grade flame-retardant insulating material, and its main material is the mixture of PC and ABS, through high-temperature injection, processes and is shaped to shell body.
3. the surging prevention device for circuit board according to claim 1; it is characterized in that: the design of the fixedly employing screwless buckle between described shell and bottom; between upper-lower casing, install many buckles and groove, the two ends design pin that is positioned at housing directly can be welded on circuit board.
4. the surging prevention device for circuit board according to claim 1; it is characterized in that: described elastic component is the working of plastics that center cavity both sides have symmetric arms; its center cavity has oval cavity; cavity is socketed on the cylindrical axostylus axostyle being connected with shell, and elastic component can slide up and down around central fixed shaft.
5. elastic plastic member according to claim 4, is characterized in that: bilateral symmetry arm is to a direction bend relief, and the arm end points of projection is column type, holds respectively the separated current bar of the left and right sides.
6. elastic plastic member according to claim 4, it is characterized in that: two brachiocylloosis initial part abut against on the plastics barrier section of intermediate openings, described plastics barrier section limits the displacement of two arm occurred level directions of elastic plastic member, and the moving contact close contact of the contact of elastic plastic member and sensitive switch.
7. the surging prevention device for circuit board according to claim 1; it is characterized in that: the contact elastic plastic member of described sensitive switch and being fixed in the rectangular channel of shell body; sensitive switch top is provided with moving contact; inside configures respectively one group and often opens and normally closed contact-making switch; by the closed of the movable percussion switch of moving contact with open, export two groups of different signals.
8. the surging prevention device for circuit board according to claim 1; it is characterized in that: adopt isolation over the ground and the design of equipotential circuit; two groups of corresponding holding wires that connect of piezo-resistance are to upper; one group of ceramic gas discharge tube two end electrodes is linked respectively phase adjacency pair holding wire to upper, and gas discharge tube target is connected to jointly to be gone up.
CN201210281721.5A 2012-08-09 2012-08-09 Surge protection device for circuit board Active CN103580019B (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN201210281721.5A CN103580019B (en) 2012-08-09 2012-08-09 Surge protection device for circuit board

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CN103580019B CN103580019B (en) 2016-09-28

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103825260A (en) * 2014-02-28 2014-05-28 北京欧地安科技股份有限公司 Power supply surge protective device
CN105703346A (en) * 2015-05-26 2016-06-22 深圳普泰电气有限公司 Large-discharge-current surge protector
CN107924742A (en) * 2016-06-22 2018-04-17 德恩及索恩两合股份有限公司 Include the over-pressure safety device of at least one dish type varistor being arranged on the first side of n sides shape support plate
CN109888758A (en) * 2019-02-19 2019-06-14 成都标定科技有限责任公司 A kind of single-phase PCB type power source surge protector of 40kA
WO2020155649A1 (en) * 2019-01-29 2020-08-06 厦门赛尔特电子有限公司 Surge protector

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006031158A1 (en) * 2004-09-16 2006-03-23 Telefonaktiebolaget Lm Ericsson (Publ) Over-protection circuit for indoor digital signal communication
CN200941370Y (en) * 2006-09-01 2007-08-29 宁波能士通信设备有限公司 Surge protector
CN201440606U (en) * 2009-07-06 2010-04-21 佛山市浦斯电子有限公司 Surge protector
CN101860008A (en) * 2010-05-13 2010-10-13 菲尼克斯亚太电气(南京)有限公司 Electric-connection thermal tripping operating display device, electronic device and large-discharge surge protector

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006031158A1 (en) * 2004-09-16 2006-03-23 Telefonaktiebolaget Lm Ericsson (Publ) Over-protection circuit for indoor digital signal communication
CN200941370Y (en) * 2006-09-01 2007-08-29 宁波能士通信设备有限公司 Surge protector
CN201440606U (en) * 2009-07-06 2010-04-21 佛山市浦斯电子有限公司 Surge protector
CN101860008A (en) * 2010-05-13 2010-10-13 菲尼克斯亚太电气(南京)有限公司 Electric-connection thermal tripping operating display device, electronic device and large-discharge surge protector

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103825260A (en) * 2014-02-28 2014-05-28 北京欧地安科技股份有限公司 Power supply surge protective device
CN103825260B (en) * 2014-02-28 2018-04-27 北京欧地安科技有限公司 Power source surge protector
CN105703346A (en) * 2015-05-26 2016-06-22 深圳普泰电气有限公司 Large-discharge-current surge protector
CN105703346B (en) * 2015-05-26 2018-06-05 深圳普泰电气有限公司 Large-discharge surge protector
CN107924742A (en) * 2016-06-22 2018-04-17 德恩及索恩两合股份有限公司 Include the over-pressure safety device of at least one dish type varistor being arranged on the first side of n sides shape support plate
CN107924742B (en) * 2016-06-22 2020-08-11 德恩塞两合公司 Overvoltage protection device comprising a disk-shaped varistor
WO2020155649A1 (en) * 2019-01-29 2020-08-06 厦门赛尔特电子有限公司 Surge protector
CN109888758A (en) * 2019-02-19 2019-06-14 成都标定科技有限责任公司 A kind of single-phase PCB type power source surge protector of 40kA

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Inventor after: Ren Huashan

Inventor after: Xu Zhuqin

Inventor after: Gu Jiandang

Inventor before: Ren Huashan

Inventor before: Xu Zhuqin

C14 Grant of patent or utility model
GR01 Patent grant
CP01 Change in the name or title of a patent holder
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Address after: 211100 No. 36 Phoenix Road, Jiangning Development Zone, Nanjing City, Jiangsu Province

Co-patentee after: Feinikesi (Nanjing) Intelligent Manufacturing Technology Engineering Co., Ltd.

Patentee after: Phoenix Contact Asia-Pacific Electrical (Nanjing) GmbH

Address before: 211100 No. 36 Phoenix Road, Jiangning Development Zone, Nanjing City, Jiangsu Province

Co-patentee before: Nanjing Phoenix Contact Co., Ltd.

Patentee before: Phoenix Contact Asia-Pacific Electrical (Nanjing) GmbH