A kind of signal Surge Protector
Technical field
The present invention relates to a kind of signal Surge Protector, especially relate to a kind of signal Surge Protector with aging indication and thermal release device, belong to the device of emergency protective circuit.
Background technology
The effect of signal Surge Protector is: the big electric current of sudden change of signal transmission line is imported the earth, as: grid line, telephone wire, various signal transmssion lines etc. meet with thunderstorm hour, the safety of protection subsequent conditioning circuit.But the signal Surge Protector can be aging gradually along with the increase of service time, the performance degradation of its anti-current break.In the prior art, there is the ZL201258381.2 utility model patent to disclose a kind of siganl thunder-proof device.It is the lightning protection device operating state exactly that this patent provides a kind of lightning protection electric device volume temperature jump characteristic of can effectively utilizing, and that is to say: the patented product has the aging effect of index signal lightning protection device.But this utility model patent only has the aging effect of indication, and the effect that does not have heat to thread off, and namely after this siganl thunder-proof device was aging, aging discharge circuit wherein can work on, thereby the safety of the follow-up entire circuit that this lightning protection device is protected hides some dangers for.
Summary of the invention
Technical problem to be solved by this invention is: a kind of signal Surge Protector is provided, and the sort signal protector also has the effect that heat is threaded off except having aging indicative function.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of signal Surge Protector, by the circuit board with discharge circuit, shell, circuit board installing rack and pin constitute, the circuit board that wherein has discharge circuit is installed on the circuit board installing rack, described shell is enclosed within outside the described circuit board installing rack, described pin is welded on the circuit board with discharge circuit, be welded with divider resistance R1 at the circuit board with discharge circuit, R2, gas discharge tube G, Transient Suppression Diode T, switching diode D1, D2, D3, D4 and some leads, they constitute a signal surge discharge circuit together, it is characterized in that: described Transient Suppression Diode T is as parts of heat dropout indicating mechanism, an one pin directly is welded on the circuit board with discharge circuit, another pin is connected on the circuit board with discharge circuit by the miscellaneous part of heat dropout indicating mechanism, described hot dropout indicating mechanism is by Transient Suppression Diode T, mobile indicator board installing rack, metal-coating, mobile indicator board, extension spring and flexible conductor are formed, wherein, upper surface at mobile indicator board installing rack is provided with the twice groove, mobile indicator board can be inserted in the groove, and along its slip; Described metal-coating is wrapped in the outer surface of described Transient Suppression Diode T, and inserts in the mobile indicator board installing rack after another pin welding of Transient Suppression Diode T, at metal-coating a projection is arranged; Described mobile indicator board is movably arranged on the upper surface of mobile indicator board installing rack, has the hole of a thin-and-long in the central authorities of mobile indicator board along long side direction, is provided with metal level on the surface of mobile indicator board one end; Described projection stretches in the thin-and-long hole on the mobile indicator board, and with mobile indicator board on the low-melting Metal Material Welding of metal level; Described extension spring is fixed between mobile indicator board and the mobile indicator board installing rack with being in extended state, and the one end is fixed on the mobile indicator board, and the other end is fixed on the mobile indicator board installing rack; Described flexible conductor one end is welded on the metal level of mobile indicator board, and the other end is welded on the circuit board with discharge circuit; The color of described mobile indicator board installing rack and mobile indicator board is inequality; The top of described shell has an observation panel, and the position of this observation panel need be satisfied before dropout can observe mobile indicator board from this observation panel, can observe mobile indicator board installing rack from observation panel after dropout.
Described mobile indicator board installing rack is installed on the described circuit board installing rack, be positioned at the top of the circuit board with discharge circuit.
The material of described mobile indicator board is pcb board.
Described low melting point metal material is low temperature scolding tin.
The material of described shell, circuit board installing rack and mobile indicator board installing rack is high-temperature flame-retardant plastic.
The invention has the beneficial effects as follows: compact conformation, cheap for manufacturing cost, processing comparatively convenient; The indication of effectively threading off; in addition; the present invention also has the effect that heat is threaded off; namely after Transient Suppression Diode T melts low melting point metal material owing to aging temperature raises; move at once on the extension spring limit, is that metal-coating and mobile indicator board break away from, thereby cuts off aging discharge circuit; make this signal Surge Protector keep out-of-work pass-through state, can not influence the operate as normal of shielded subsequent conditioning circuit.
Description of drawings
Fig. 1 is the principle schematic of discharge circuit of the present invention.
Fig. 2 is overall structure schematic diagram of the present invention.
Fig. 3 is the vertical view of view among Fig. 2.
Fig. 4 is the upward view of view among Fig. 2.
Fig. 5 is the front view of Transient Suppression Diode among the present invention and metal-coating.
Fig. 6 is the right view of view among Fig. 3.
Fig. 7 is the aging preceding stereogram of threading off of hot dropout indicating mechanism among the present invention.
Fig. 8 is the stereogram after aging dropout of hot dropout indicating mechanism among the present invention.
Embodiment
Execution mode below in conjunction with accompanying drawing is explained in detail the preferred embodiments of the present invention:
As shown in Figure 2, the present invention is a kind of signal Surge Protector, and it is by being made of the circuit board 1 with discharge circuit, shell 2, circuit board installing rack 3 and pin 4.The circuit board 1 that wherein has discharge circuit is installed on the circuit board installing rack 3, described shell 2 is enclosed within outside the described circuit board installing rack 3, have an observation panel 21 at the top of shell 2, before this signal Surge Protector is threaded off, can observe the color of mobile indicator board 53 from this observation panel; After dropout, can observe the color of mobile indicator board installing rack 51 from observation panel.Shell 2 and circuit board installing rack are all made with high-temperature flame-retardant plastic, pin 4 is welded on the circuit board 1 with discharge circuit, be welded with divider resistance R1, R2, gas discharge tube G, Transient Suppression Diode T, switching diode D1, D2, D3, D4 and some leads at the circuit board 1 with discharge circuit, they constitute a signal surge discharge circuit together, and the electrical schematic diagram of this signal surge discharge circuit as shown in Figure 1.Wherein, Transient Suppression Diode T is as parts of heat dropout indicating mechanism 5, an one pin T1 directly is welded on the circuit board 1 with discharge circuit, and another pin T2 is connected on the circuit board 1 with discharge circuit by the miscellaneous part of heat dropout indicating mechanism 5.Described hot dropout indicating mechanism 5 is made up of Transient Suppression Diode T, mobile indicator board installing rack 51, metal-coating 52, mobile indicator board 53, extension spring 54 and flexible conductor 55, wherein, mobile indicator board installing rack 51 usefulness high-temperature flame-retardant plastics are made, it is installed on the circuit board installing rack 3, is positioned at the top of the circuit board 1 with discharge circuit, and is provided with twice groove 511 at the upper surface of mobile indicator board installing rack 51.Metal-coating 52 is wrapped in the outer surface of described Transient Suppression Diode T, and inserts in the mobile indicator board installing rack 51 after another pin T2 welding of Transient Suppression Diode T, at metal-coating 52 projection 521 is arranged.Mobile indicator board 53 usefulness pcb boards are made, and it is movably arranged in the groove 511 on the upper surface of mobile indicator board installing rack 51, and can slide at the effect hypopharynx groove 511 of extension spring 54.Have the hole 531 of a thin-and-long in the central authorities of mobile indicator board 53 along long side direction, be provided with metal level 532 on the surface of mobile indicator board 53 1 ends; In the described protruding 521 thin-and-long holes of stretching on the mobile indicator board 53 531, and connect with metal level 532 usefulness eutectic welding solderings on the mobile indicator board 53; Extension spring 54 is fixed between mobile indicator board 53 and the mobile indicator board installing rack 51 with being in extended state, and the one end is fixed on the mobile indicator board 53, and the other end is fixed on the mobile indicator board installing rack 51.Flexible conductor 55 1 ends are welded on the metal level 532 of mobile indicator board 53, and the other end is welded on the circuit board 1 with discharge circuit; The color of mobile indicator board installing rack 51 and mobile indicator board 53 is inequality, and wherein, mobile indicator board installing rack 51 is red, and mobile indicator board 53 is green.
The principle of hot dropout of the present invention indicating mechanism is: as shown in Figure 2; when signal Surge Protector operate as normal is; metal level 532 on a pin T1, the Transient Suppression Diode T of bottom electronic circuit by Transient Suppression Diode 7, metal-coating 52, the mobile indicator board 53 and flexible conductor 55 constitute a loop and carry out operate as normal; at this moment, the observation panel 21 from the product casing 2 is seen is green mobile indicator board 53.
After the signal Surge Protector is aging; the surface temperature of Transient Suppression Diode T will raise; because the heat transfer effect of metal-coating 52; the low temperature scolding tin temperature of the metal level 532 of the projection 521 of weld metal overcoat 52 and mobile indicator board 53 is also raise; after reaching uniform temperature; to cause the low temperature melts soldering tin; under the pulling force effect of extension spring 54; mobile indicator board 53 is pulled; be the projection 521 and mobile indicator board 53 disengagings on the metal-coating 52; thereby cut off aging circuit, made the signal Surge Protector be in the pass-through state of not working, guaranteed the work of original signal line.Because mobile indicator board 53 is different with the color of mobile indicator board installing rack 51; and mobile indicator board installing rack 51 does not block owing to having had mobile indicator board 53 after threading off; so; the color for mobile indicator board installing rack 51 that observation panel 21 on shell 2 is seen is namely red; this signal Surge Protector of surface aging dropout thus, thus reach aging indicative function.