Surge protection device
Technical field
The utility model and a kind of surge protection device, particularly a kind of surge protection device protecting pcb board power supply.
Background technology
Surge protection device is indispensable a kind of device in electronic equipment lightning protection, and the past is often called " lightning arrester " or " overvoltage protection device ".Relevant large through-flow power supply surge protection device is used for guide tracked installation form; along with electronic component is more and more to miniaturized, integrated development; limited in area space for high-density arrangement element circuitry plate; when limiting especially in the height direction, this traditional structure can not meet existing market development need far away.And with being little flow-through format in PCB, there is no hot tripping function and Presentation Function yet; Therefore; to some hidden danger that equipment protection and maintenance cause; in order to meet, power source integral is integrated, volume is miniaturized, the needs of maximizes power; require that lightning protection device should meet the ability of security protection surge and anti-overvoltage, meet communication system again more and more to the requirement that miniaturized integrated direction develops.
Phoenix carries out brand-new design to conventional power source class surge protection device, and this surge protection device is used in the power consumption equipment with power lightning protection function; Adopt design that is through-flow greatly, compact, a large amount of pulse energy short circuits that within the shortest time, release circuit can produce because of lightning induction are released greatly, reduce the potential difference between each interface of equipment, thus the equipment in protective circuit.
Summary of the invention
The technical program is improved prior art; this surge protection device; inner employing two pieces or the upper and lower lamination arrangement form of polylith piezo-resistance; gas discharge tube and remote signalling warning switch are set between two pieces of piezo-resistances; built-in multiple spot thermal release device, has alarm status and malfunction coefficient function.
The object of the technical program, will be achieved by the following technical programs:
A kind of surge protection device, comprises housing, gas discharge tube, piezo-resistance, spring, metal clips, compressing tablet, action piece, remote signalling switch.Described enclosure interior adopts two pieces or polylith piezo-resistance lamination arrangement form, between two pieces of piezo-resistances, gas discharge tube is set, described gas discharge tube embeds in the circular cavity of housing integrated molding, described piezo-resistance is close to the both sides of gas discharge tube, it is characterized in that: described gas discharge tube outer electrode is welded with symmetrical metal clips, the connection of low temperature scolding tin is carried out between the piezoresistance electrode that the described hot trip point of metal clips two end electrodes is corresponding with both sides respectively, the compressing tablet relying on spring force action is also provided with between metal clips and remote signalling switch, the frizzen of the remote signalling switch that this compressing tablet links closely described, the action piece of socket spring can slide up and down along fixed axis, the contact of described action piece and the two end electrodes close contact of metal clips.When there is overcurrent, overvoltage condition in circuit, discharged by gas discharge tube, piezo-resistance because of overload causes overheated after conduct heat to the hot trip point of metal clips of soldered, hot trip point scolding tin melts, described action piece is under the effect of Compress Spring, metal clips is separated with piezoresistance electrode, disconnects this path; Meanwhile, described compressing tablet departs from remote signalling switch, and remote signalling switch triggering bar is upspring, and sends sound and light alarm signal, and this protective circuit is in guard mode.
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 by remote signalling switch, and this design pin directly can weld on circuit boards;
2, this technical scheme circuit leakage current and rate of change little, residual voltage is low, through-current capacity is large, the response time is fast, can make the protection level that product has reached, ensure terminal equipment damage from overvoltage;
3, the small product size corresponding to this technical scheme is less, and compact structure and multiple spot heat are threaded off and designed, and short trouble automatically disengages, and has operating state and faulty indication, local alarm function, clear and intuitive;
Below in conjunction with embodiment accompanying drawing, do further to decompose to embodiment of the present utility model, be easier to make the technical program understand, grasp.
Accompanying drawing explanation
Fig. 1 is; Structural representation before the non-overvoltage protection of the utility model surge protection device
Fig. 2 is; Structural representation after the overvoltage protection of the utility model surge protection device
Fig. 3 is; The structural representation of the compressing tablet of the utility model surge protection device
In figure, the implication of each Reference numeral is:
1-housing, 2-gas discharge tube, 3-piezo-resistance, 4-spring, 5-metal clips, 6-compressing tablet, 7-action piece, 8-remote signalling switch.
Embodiment
Known with reference to figure 1, Fig. 2, a kind of surge protection device, comprises housing 1, gas discharge tube 2, piezo-resistance 3, spring 4, metal clips 5, compressing tablet 6, action piece 7, remote signalling switch 8.Two pieces or polylith piezo-resistance about 3 lamination arrangement form are embedded in corresponding housing, gas discharge tube 2 is between described piezo-resistance 3, the action piece 7 of symmetrical placement relies on spring force to act on compressing tablet 6 and metal clips 5, the hot trip point of opposite ends electrode being embedded in both sides piezo-resistance 3 in described housing 1 respectively and between corresponding metal clips 5 low temperature scolding tin weld, described gas discharge tube 2 embeds in the circular cavity of housing 1 integrated molding, be welded to connect between described metal clips 5 and gas discharge tube 2, metal clips 5 both sides have the bending side arm of expansion, the action piece 7 of socket spring 4 can slide up and down along fixed axis, the contact of described action piece 7 and the two end electrodes close contact of metal clips 5.When there is overcurrent, overvoltage condition in circuit, discharged by gas discharge tube 2, piezo-resistance 3 because of overload causes overheated after conduct heat to the hot trip point of metal clips 5 of soldered, hot trip point scolding tin melts, described action piece 7 is under the effect of Compress Spring 4, by metal clips 5 and piezo-resistance 3 electrode separation, disconnect this path; Meanwhile, described compressing tablet 6 departs from remote signalling switch 8 after action piece 7 moves, and remote signalling switch 8 frizzen is upspring, and sends sound and light alarm signal, and this protective circuit is in guard mode.
Described housing 1 adopts buckle connected mode to design, and housing 1 is inner any is insulation isolation between two between components and parts, ensure that the requirement of electric clearance and creepage distance, assemble simple and fast in addition, small product size is little, saves installing space.
Further, the described cylindrical working of plastics of action piece 7, its top has wedge type rod head, and lower end is provided with boss, this boss presses described both sides compressing tablet 6, and described action piece 7 wedge type rod head withstands the hot trip point of both sides metal clips 5 under the elastic force active force of spring 4; Described action piece 7 can slide up and down along the inner fixed axis of housing 1.
As shown in Figure 3, described compressing tablet 6 is also the arcuate resilient working of plastics of symmetrical distribution, and its center has a tractive elastic cable, and connect two side, this elastic cable is wavy.
Further, the metal clips 5 of described bilateral symmetry distribution, its two-arm is initial to gas discharge tube 2 lower ends bent from center, and its two ends are connected with the hot trip point soldered of piezo-resistance 3 two end electrodes, and conducting is welded with gas discharge tube 2 outer electrode in its center.
In sum, above is only one of embody rule example of the present utility model, and the specification of scheme and the equivalent structure of accompanying drawing content as adopted the utility model technology substitute, all in the protection range of the utility model content not because being subject to any restriction.