CN204011334U

CN204011334U - A kind of surge bleeder of tool insurance mechanism

Info

Publication number: CN204011334U
Application number: CN201420243994.5U
Authority: CN
Inventors: 陈赞棋
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-05-13
Filing date: 2014-05-13
Publication date: 2014-12-10
Anticipated expiration: 2024-05-13

Abstract

A surge bleeder for tool insurance mechanism, comprises a dielectric material, two conductive plates and an insulating wrapped body; Dielectric material is a plate body of being made up of poly semiconductor ceramic material, is covered with respectively an electrode on the two relative side of dielectric material; On conductive plate, the position of contiguous its one end is pasted to respectively each electrode with the face way of contact, and the other end of conductive plate, as a pin, is electrically connected to electronic equipment feeder ear by pin, and the basal area at the position, stage casing of conductive plate is less than the basal area at other position; The coated dielectric material of insulating wrapped body and conductive plate, only make pin be exposed at insulating wrapped outward external.In the time that a great immediate current continues to produce high temperature by surge bleeder, open circuit because this immediate current and the high temperature that produces thereof disconnect rapidly forming in the position, stage casing of conductive plate, avoid surge bleeder because of large electric current continue by, continue accumulation high temperature catching fire, and then effectively prevent electronic equipment or on it electronic circuit, element damage.

Description

A kind of surge bleeder of tool insurance mechanism

Technical field

The utility model relates to a kind of surge bleeder, espespecially a kind of simple in structure, and can be completely without setting up under the prerequisite of extra safety element, still possess the surge bleeder of a kind of tool insurance mechanism of safety element characteristic, with effectively prevent surge bleeder because of large electric current continue by, continue accumulation high temperature and occur the danger of catching fire.

Background technology

Most electronic equipment all may meet with surging and impact in operation, and be damaged, wherein, so-called " surging " also can be referred to as " high voltage (stream) pulse ", and produce source according to it and still can divide into " the outside surging producing of circuit " and " surging that inside circuit produces " two kinds, generally speaking, " the outside surging producing of circuit " is mostly because electronic equipment surrounding environment is struck by lightning, or due to its circuit is directly struck by lightning, therefore, be called again thunder surging (lightning surge); " surging that inside circuit produces ", mostly for electronic switch in electronic equipment switches the surging that start is supervened, therefore, is called again and switches surging (switching surge).

In most of electronic equipments, be provided with now the switching controls elements such as relay (relay), electronic switch (switch) or magnetic plug (solenoid), in the operation of this electronic equipment, switching controls element will certainly be carried out a large amount of switching actions, to disconnect and conducting circuit, and therefore produce a large amount of surgings, and then the running of this electronic equipment is caused to negative effect, and as: cause electronic equipment misoperation etc.For solving foregoing problems; traditionally; the dealer of associated electronic device all can arrange a surge bleeder on the feeder ear of this class of electronic devices; so that in the time producing surging; can see through this surge bleeder and form a discharge path; this surging is directed to an earth terminal, and then protects this electronic equipment can not suffer damage because of this surging.

Traditionally, metal oxide piezo-resistance (Metal Oxide Varistor, be called for short MOV) be a kind of for making the dielectric material of traditional surge bleeder, the poly semiconductor ceramic component that this dielectric material is generally formed by Zinc oxide particles and a small amount of other metal oxide or polymer mixed sintering, in this dielectric material, owing to including huge amount and mixed and disorderly Zinc oxide particles, and the intersection of Zinc oxide particles and other oxide, can form grain boundary layer, and generation diode effect, therefore, whole dielectric material is equivalent to a large amount of aggregates of connected diode dorsad, under the state of low-voltage, only there is the small converse electrical leakage electric current of few part can pass through this dielectric material, but, in the time running into high voltage, can there is punch-through effect (punch-through effect), make high-tension large electric current can pass through this dielectric material, why dielectric material can be widely used in making surge bleeder, it is mainly high resistance while possessing low-voltage because of it, low-resistance nonlinear current-voltage when high voltage.

Although for a long time, aforementioned conventional surge bleeder can be reached the object of the surging of releasing really, but, after studying for a long period of time and observe, inventor finds, still there is in design many improved defects for the treatment of in this quasi-tradition surge bleeder.

Refer to shown in Fig. 1, Fig. 2, for modal traditional surge bleeder 1 on market, this tradition surge bleeder 1 comprises a dielectric material 10, one first wire (or conductive plate) 120, one second wire (or conductive plate) 121 and an insulating wrapped body 13; Wherein, this dielectric material 10 is plate bodys of being made up of aforementioned poly semiconductor ceramic material, is covered with respectively one first electrode (electrode) 110 and one second electrode 111 on the two relative side of dielectric material 10; On described the first wire 120, the position of contiguous its one end is welded and fixed to described the first electrode 110, the other end of the first wire 120 is as one first pin 1201, to be electrically connected to the feeder ear (not shown) of an electronic equipment by this first pin 1201; On this second wire 121, to be welded and fixed to the other end of the second electrode 111, the second wires 121 be as one second pin 1211 at the position of contiguous its one end, to be electrically connected to the feeder ear of electronic equipment by the second pin 1211; Insulating wrapped body 13 is coated on dielectric material 10, the first wire 120 and the second wire 121, only makes to be exposed at outside insulating wrapped body 13 outside the first pin 1201 and the second pin 1211.

In this tradition surge bleeder 1, between described wire 120,121 and dielectric material 10, be the annexation of " line contacts ", therefore, under limited bonding area, mutual fixing position between dielectric material 10 and each wire 120,121 must bear high voltage and electric current, very easily bursts apart, moreover, because the required voltage bearing of unit are and the electric current of this dielectric material 10 are also high, therefore, in the time that higher transient voltage passes through this dielectric material 10, on the resistive element of this dielectric material 10, produce most probably perforation, cause larger immediate current to pass through, and to produce high heat on fire because of electric arc, in addition, many results of study all show, this tradition surge bleeder 1 is suffering repeatedly after heavy current impact, even if do not occur immediately, aforementioned moment bursts apart or the situation of catching fire, it is aging that too high temperature also can be accelerated dielectric material 10, make dielectric material 10 that the phenomenon of low-resistance linearisation progressively occur, and on dielectric material 10, produce some tender spots, therefore, when higher leakage current occurrence frequency increases, and leakage current is concentrated while flowing into each tender spots, the material melting that makes each tender spots is formed to short circuit hole, now, if follow-up large electric current pours into each short circuit hole, will inevitably produce high heat, and then make traditional surge bleeder 1 catching fire.

In view of this, refer to shown in Fig. 3, dealer is in the time being mounted to a feeder ear Vi of an electronic equipment 2 by traditional surge bleeder 1, all can be connected in parallel between the circuit of this feeder ear Vi and electronic equipment 2, and one of therein for the safety element 3 (fuse) of connecting on electric pin, to at this dielectric material 10 and each wire 120, the mutual fixing position of 121 bursts apart, or on the resistive element of dielectric material 10, produce under the situation of perforation, make the large electric current that fuse in described safety element 3 can pass through by moment and the high temperature being produced thereof fuse, become off state, there is the danger of aforementioned catching fire to avoid continued power, and then guarantee that therefore this electronic equipment unlikely and impaired.

Therefore, setting up safety element 3 not only can increase manufacturing cost, also can increase the complexity of line design, and take circuit space, and this is also for interlock circuit cannot be designed to more compact main cause.For this, refer to shown in Fig. 4, part dealer's imagination is set up a warming safety element 14 (thermal fuse) in the traditional surge bleeder 1 shown in Fig. 1 and Fig. 2, one end 141 of this warming safety element 14 is welded and fixed on described the first electrode 110, and together with described dielectric material 10, the first wire 120 and the second wire 121 are all covered by insulating wrapped body 13, only make the first pin 1201, outer being exposed at outside insulating wrapped body 13 of the other end 142 of the second pin 1211 and warming safety element 14, while exceeding a predetermined critical to sense the temperature of the first electrode 110 at warming safety element 14, warming safety element 14 can become off-state, and then order about described feeder ear and end to continue power supply, but, this design and the practice, except omitting the cost of warming safety element 14, also can increase the volume of traditional surge bleeder 1 itself and shared space on circuit, and its integrated circuit Shang Yinxu is designed to according to the disconnection of warming safety element 14, and end to power in good time, therefore make integrated circuit become more complicated.

Known in sum, how to design a kind of simple in structure and do not increase the surge bleeder of cost, make it possess except the characteristic of the surging of releasing, still can be completely without setting up under the prerequisite of extra safety element, still possesses the characteristic of safety element, with at dielectric material 10 and each wire 120, 121 mutual fixing positions burst apart, or the resistive element of dielectric material 10 produces under the situation of perforation, surge bleeder is become to open circuit, and then effectively avoid the dangerous of aforementioned catching fire occurring and guaranteeing that described electronic equipment is unlikely impaired, become the utility model and desire most ardently the important topic of discussion at this.

Utility model content

Object described in the utility model is to design a kind of surge bleeder of tool insurance mechanism, can significantly improve the fail safe of surge bleeder, and then effectively guarantees electronic equipment safety in the use.

For achieving the above object, the technical solution of the utility model is:

A surge bleeder for tool insurance mechanism, comprises a dielectric material, one first conductive plate, one second conductive plate and an insulating wrapped body; Wherein, described dielectric material is a plate body of being made up of poly semiconductor ceramic material, is covered with respectively one first electrode and one second electrode on the two relative side of described dielectric material; On described the first conductive plate, the position of contiguous its one end is pasted to described the first electrode with the face way of contact, the other end of the first conductive plate is as one first pin, to be electrically connected to the feeder ear of an electronic equipment by above-mentioned the first pin, the basal area that is positioned at the position, stage casing between its two ends on described the first conductive plate is less than the basal area at other position, to bear a large electric current at position, described stage casing, and when its high temperature producing exceedes a predetermined critical, described center section part potential energy is by quick-break, and generation is equivalent to the effect of fuse; On described the second conductive plate, the position of contiguous its one end is pasted to the second electrode with the face way of contact, the other end of above-mentioned the second conductive plate is as one second pin, to be electrically connected to the feeder ear of electronic equipment by above-mentioned the second pin, the basal area that is positioned at the position, stage casing between its two ends on the second conductive plate is less than the basal area at other position, to bear a large electric current at position, described stage casing, and when the high temperature that the second conductive plate produces exceedes a predetermined critical, described center section part potential energy is by quick-break, and generation is equivalent to the effect of fuse; Described insulating wrapped body is coated on dielectric material, the first conductive plate and the second conductive plate, and the position, stage casing of coated the first conductive plate and the second conductive plate, only makes the first pin and the second pin be exposed at outside this insulating wrapped body outward.So, when the impulse current surge bleeder of flowing through, and its high voltage cause on conductive plate the position of contiguous its one end on counter electrode, collapse respectively from, or this dielectric material of its high electrical breakdown, cause great immediate current to continue by this surge bleeder, and while producing high temperature, the center section part potential energy of each conductive plate is because of large electric current and the high temperature that produces thereof, and by quick-break, form off state, to avoid described surge bleeder because continuing accumulation temperature catching fire, and then effectively prevent electronic equipment or on it electronic circuit or element therefore impaired.

Further, described conductive plate is made up of conducting metal, described conducting metal can be aluminium, silver, tin, zinc or its alloy, its fusing point is lower than copper, and its impedance is higher than copper, and can be at large electric current when the position, stage casing by each conductive plate, can be less than because of the basal area at position, described stage casing the basal area at other position, and produce high temperature at position, described stage casing, and make center section part potential energy Yin Gaowen and fused rapidly, formation is opened circuit.

Again, the position, stage casing of each conductive plate offers at least one slotted eye, and described slotted eye runs through position, described stage casing, so that the basal area at position, stage casing is less than the basal area at other position.

Have, described slotted eye is formed in the position, stage casing of conductive plate again, so that the basal area at this position, stage casing is less than the basal area at other position.

In addition, described slotted eye is formed on the either side at the position, stage casing of conductive plate, so that the basal area at position, stage casing is less than the basal area at other position.

Brief description of the drawings

Fig. 1 is the decomposing schematic representation of traditional surge bleeder;

Fig. 2 is the partial cutaway schematic after traditional surge bleeder has been assembled;

Fig. 3 is the installation conspectus of traditional surge bleeder;

Fig. 4 is the partial cutaway schematic after another traditional surge bleeder has been assembled;

Fig. 5 is the partial cutaway schematic after the utility model the first embodiment has assembled;

Fig. 6 is the partial cutaway schematic after the utility model the second embodiment has assembled.

In Fig. 1～Fig. 4,1, traditional surge bleeder; 10, dielectric material; 110, the first electrodes; 111, the second electrodes; 120, the first wires; 1201, the first pins; 121, the second wires; 1211, the second pins; 13, insulating wrapped body; 14 warming safety elements; 141, warming safety element one end; 142, the warming safety element other end; 2, electronic equipment; 3, safety element; Vi, power-feed section.

In Fig. 5～Fig. 6,5, surge bleeder; 50, dielectric material; 510, the first electrodes; 520, the first conductive plates; 5201, the first pins; 5202, position, stage casing; 5211, the second pins; 53, insulating wrapped body; A, B, slotted eye.

Embodiment

For ease of the utility model object, technical characterictic and effect thereof being done to further understanding and understanding, coordinate accompanying drawing for embodiment, be described in detail as follows:

Referring to Fig. 5, the utility model provides a kind of surge bleeder of tool insurance mechanism, this surge bleeder is applied to an electronic equipment feeder ear, in the first preferred embodiment of the present utility model, described surge bleeder 5 comprises a dielectric material 50, one first conductive plate 520, one second conductive plate (not shown) and an insulating wrapped body 53, wherein, the plate body of described dielectric material 50 for being made up of poly semiconductor ceramic material, is covered with respectively one first electrode 510 and one second electrode (not shown) on the two relative side of this dielectric material 50, on described the first conductive plate 520, the position of contiguous its one end is pasted to the first electrode 510 with the face way of contact, the other end of the first conductive plate 520 is as one first pin 5201, with be electrically connected to by this first pin 5201 electronic equipment feeder ear (not shown), the position, stage casing 5202 one of being positioned on the first conductive plate 520 between its two ends basal area be less than other position basal area, to bear a large electric current at position, described stage casing 5202, and when its high temperature producing exceedes a predetermined critical, this position, stage casing 5202 can be fused, and generation is equivalent to the effect of fuse, on this second conductive plate contiguous its one end position be also pasted to this second electrode with the face way of contact, this the second conductive plate the other end as one second pin 5211, with be electrically connected to by this second pin 5211 described electronic equipment feeder ear, the basal area at the position, stage casing one of being positioned on this second conductive plate between its two ends is less than the basal area at other position, to bear a large electric current at position, described stage casing, and when its high temperature producing exceedes a predetermined critical, center section part potential energy is fused, and produces the effect that is equivalent to fuse, insulating wrapped body 53 is coated on dielectric material 50, the first conductive plate 520 and the second conductive plate, and the position, stage casing 5202 of coated each conductive plate 520, only makes to be exposed at outside insulating wrapped body 53 outside the first pin 5201 and the second pin 5211.

So, when the impulse current surge bleeder 5 of flowing through, and its high voltage cause on the first conductive plate 520 on self-corresponding first electrode 510 in position of contiguous its one end, collapse from, or its high electrical breakdown dielectric material 50, cause very big immediate current to continue by surge bleeder 5, and produce when excessive temperature, the position, stage casing 5202 of the first conductive plate 520 can disconnect rapidly because of described great immediate current or high temperature, formation is opened circuit, to protect described electronic equipment, avoid surge bleeder 5 because continuing accumulation temperature catching fire, and then effectively prevent electronic equipment or on it electronic circuit or element therefore impaired.

Refer to again shown in Fig. 5, in described the first preferred embodiment, the position, stage casing 5202 of the first conductive plate 520 (and/or second conductive plate) offers at least one slotted eye A, described slotted eye A runs through position, stage casing 5202, so that the basal area at position, stage casing 5202 is less than the basal area at other position, although in described the first preferred embodiment, described slotted eye A is formed in the position, stage casing 5202 of the first conductive plate 520 (and/or second conductive plate).

But, the utility model is not limited to this, in the second preferred embodiment of the present utility model, refer to shown in Fig. 6, slotted eye B also can be formed on the either side at the position, stage casing 5202 of the first conductive plate 520 (and/or second conductive plate), so that the basal area at position, stage casing 5202 is less than the basal area at other position.

In aforementioned preferred embodiment of the present utility model, the first conductive plate 520 (and/or this second conductive plate) is made up of conducting metal, this conducting metal can be aluminium, silver, tin, zinc or its alloy, its fusing point is lower than copper, its resistance value is higher than copper, with in the time that great immediate current passes through the position 5202, stage casing of the first conductive plate 520, can be less than because of the basal area at position, described stage casing 5202 basal area at other position, and produce high temperature at position, stage casing 5202, make this position, stage casing 5202 energy Yin Gaowen and fused rapidly, formation is opened circuit.

In addition, in other preferred embodiment of the present utility model, the first conductive plate 520 (and/or second conductive plate) is gone up contiguous its one end and is pasted to the surface area at the position of the first electrode 510, be greater than the surface area at other position on the first conductive plate 520, to increase the electrically conducting area between described the first conductive plate 520 and corresponding the first electrode 510.

So, the utility model can be completely without setting up under the prerequisite of extra safety element, utilize simple structure and framework with low cost in previous embodiment, volume production is produced the surge bleeder that has insurance function concurrently, burst apart with mutual fixing position between each electrode 510 and each conductive plate 520, or the resistive element of dielectric material 50 produces under the situation of perforation, make high temperature that the position, stage casing 5202 of the first conductive plate 520 can produce because of large electric current by quick-break, and then make surge bleeder 5 become rapidly off state, with avoid occurring described in prior art and the danger of catching fire, and guarantee that electronic equipment is unlikely therefore impaired.

The above; be only some preferred embodiments of the present utility model; therefore; the interest field that the utility model is advocated is not limited to this; in every case be familiar with the personnel of this technology; according to technology contents disclosed in the utility model, the equivalence that can consider easily changes, and all should belong to and not depart from protection category of the present utility model.

Claims

1. a surge bleeder for tool insurance mechanism, is characterized in that, comprising:

One dielectric material, a plate body of being made up of poly semiconductor ceramic material, is covered with respectively an electrode on the two relative side of described dielectric material;

Two conductive plates, on conductive plate, the position of contiguous its one end is pasted to respectively described each electrode with the face way of contact, the other end of described each conductive plate is as a pin, described each conductive plate is electrically connected to the feeder ear of an electronic equipment by described pin, the basal area that is positioned at the position, stage casing between its two ends at least one conductive plate is less than the basal area at other position, to bear a large electric current at position, described stage casing, and when its high temperature producing exceedes a predetermined critical, described center section part potential energy is fused, and produces the effect that is equivalent to fuse; And

One insulating wrapped body, is coated on described dielectric material and conductive plate, and the position, stage casing of coated each conductive plate, only makes described pin be exposed at insulating wrapped outward external.

2. surge bleeder as claimed in claim 1, is characterized in that, described conductive plate stage casing offers at least one slotted eye on position, and described slotted eye runs through this position, stage casing, so that the basal area at position, stage casing is less than the basal area at other position.

3. surge bleeder as claimed in claim 2, is characterized in that, described conductive plate slotted eye is formed in position, described conductive plate stage casing.

4. surge bleeder as claimed in claim 2, is characterized in that, described conductive plate slotted eye is formed on the either side at position, described conductive plate stage casing.

5. the surge bleeder as described in claim 3 or 4, it is characterized in that, contiguous its one end and be pasted to the surface area of described electrode area on described conductive plate, is greater than the surface area at other position on conductive plate, to increase the electrically conducting area between described conductive plate and counter electrode.