CN2713708Y - Open loop protection device for safety unit - Google Patents
Open loop protection device for safety unit Download PDFInfo
- Publication number
- CN2713708Y CN2713708Y CN 200420022781 CN200420022781U CN2713708Y CN 2713708 Y CN2713708 Y CN 2713708Y CN 200420022781 CN200420022781 CN 200420022781 CN 200420022781 U CN200420022781 U CN 200420022781U CN 2713708 Y CN2713708 Y CN 2713708Y
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- Prior art keywords
- input
- over
- open
- security unit
- elastic spring
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- Expired - Lifetime
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Abstract
The utility model is an open loop protection device for safety unit, consisting of an outline input end, an over-voltage protection input end, an over-current preventing input end, an elastic spring and a support frame. The elastic spring is provided with a built-in end and an expansion end, the built-in end is fixed on the support frame, and the expansion end is connected with the outline input end and the over-voltage protection input end through solder and then is connected with the over-current protection input end through electric connection. The support frame is made up by a printed circuit board, and the printed circuit board is provided with a discharge tube and a positive temperature coefficient thermistor or an over-voltage protection and over-current protection integrated circuit. If the accident of over-voltage and over-current occurs, the solder which connects the elastic spring can be melted by using the heat discharged by the discharge tube or the over-voltage protection and the over-current protection integrated circuit, and then the elastic spring is separated from the outline input end, so the open of the circuit of the outline input end is realized. The utility model has simple structure and high reliability, and has strong acclimatization to the safety unit with various structures.
Description
Technical field:
The utility model relates to electricity field; relate in particular to essential electronic element; be particularly related to the overvoltage overcurrent protective device in the telephone communication circuit; be specifically related to the overvoltage overcurrent protective device that the main frame Security Unit in the telephone communication circuit is used, concrete is a kind of open-circuit protecting device that is used for Security Unit.
Background technology:
In the prior art, the Security Unit in the communication line mainly contains four classes, and wherein the first kind is a plain edition incoming line shorted to earth formula structure; Second class is that bimetal leaf is from recovery type incoming line shorted to earth formula structure; The 3rd class is a plain edition incoming line open type structure, has wherein comprised modes such as fusible link, printed circuit board (PCB) again, and the 4th class is manually to recover type incoming line open type structure or open circuit reed mode.All there are many limitations in the Security Unit of described this four class formation when practical application, be in particular in following several aspect:
The Security Unit of plain edition incoming line shorted to earth formula structure when using in unattended access site, run into big electric current and can cause a large amount of heats, and unattended situation can't guarantee in-situ processing timely that hard fire is to avoid.
Bimetal leaf is from the Security Unit of recovery type incoming line shorted to earth formula structure; because of the state after the bimetal leaf action need maintain on the higher temperature; and after in fact FS moves; discharge tube stops discharge; bimetal leaf can't obtain heat and keep higher temperature from discharge tube again; so bimetal leaf automatically resets again; produce vibration so repeatedly; cause communication line can't operate as normal and Security Unit in the premature failure of protection device; go into the scope that the big electric current in ground can bear greater than telecommunication cable simultaneously, therefore the danger of fire arranged equally.
The Security Unit of plain edition incoming line open type structure, wherein alarm is finished by two cover independent components with open circuit, but because outside line and power line touch some the randomness apart from the distance of equipment, the size that has determined to produce on the line overcurrent is indefinite, and the length of open circuit element operate time directly depends on the size of the electric current of flowing through, so outputting alarm in the time of can't guaranteeing to open a way, owing to can not in time carry out the fault prompting, be unfavorable for the unimpeded of communication line, also exist the attendant simultaneously by the danger of outer line end suspension high voltage injury.
The Security Unit of manual recovery type incoming line open type structure, the problem of outputting alarm when having solved open circuit, but must increase action reset mechanism in the unit, complex structure is low to the Security Unit adaptive capacity of different structure, especially when the generation power line touches, the big electric current open circuit reed elastic arm of flowing through, exist the open circuit reed because of overheated elastic loss may, and can produce arcing during the open circuit action, contact performance deterioration after resetting causes the unit reliability to reduce.
Summary of the invention:
Technical problem of the prior art to be solved in the utility model is: there are many limitations respectively in the structure that four classes of widespread usage are used for the Security Unit of communication line in the prior art, when wherein the Security Unit of plain edition incoming line shorted to earth formula structure is used in unattended access site, run into big electric current and can cause a large amount of heats, and unattended situation can't guarantee in-situ processing timely, and hard fire is to avoid; Wherein the state of bimetal leaf after the Security Unit of recovery type incoming line shorted to earth formula structure moves because of bimetal leaf need maintain on the higher temperature, and after in fact FS moves, discharge tube stops discharge, bimetal leaf can't obtain heat and keep higher temperature from discharge tube again, so bimetal leaf automatically resets again, produce vibration so repeatedly, cause communication line can't operate as normal and Security Unit in the premature failure of protection device, go into the scope that the big electric current in ground can bear greater than telecommunication cable simultaneously, therefore the danger of fire arranged equally; Wherein the alarm of the Security Unit of plain edition incoming line open type structure is finished by two cover independent components with open circuit, but because outside line and power line touch some the randomness apart from the distance of equipment, the size that has determined to produce on the line overcurrent is indefinite, and the length of open circuit element operate time directly depends on the size of the electric current of flowing through, so outputting alarm in the time of can't guaranteeing to open a way, owing to can not in time carry out the fault prompting, be unfavorable for the unimpeded of communication line, also exist the attendant simultaneously by the danger of outer line end suspension high voltage injury; Wherein must increase action reset mechanism in the Security Unit of manually recovery type incoming line open type structure, complex structure, Security Unit adaptive capacity to different structure is low, especially when the generation power line touches, the big electric current open circuit reed elastic arm of flowing through, exist the open circuit reed because of overheated elastic loss may, and can produce arcing during the open circuit action, contact performance deterioration after resetting causes the unit reliability to reduce.
The utility model is that the technical scheme that solution above-mentioned technical problem of the prior art is adopted provides a kind of open-circuit protecting device that is used for Security Unit; the described this open-circuit protecting device of Security Unit that is used for is by at least one outside line input; at least one overvoltage protection input; at least one over-current protection input; at least one elastic spring and at least one bracing frame constitute; wherein; described outside line input and overvoltage protection input all are arranged on the described bracing frame; described elastic spring has a stiff end and a movable end; described stiff end is fixedly installed on the described bracing frame; described movable end contacts simultaneously with the overvoltage protection input with described outside line input and is connected, and described elastic spring and described over-current protection input are electrically connected.
Further, described bracing frame is made of printed circuit board (PCB), described outside line input is made of one first copper film electrode, described overvoltage protection input is made of one second copper film electrode, described first copper film electrode and the described second copper film electrode all are arranged on the surface of described printed circuit board (PCB), the stiff end of described elastic spring is fixedly installed on the described printed circuit board (PCB), and the movable end of described elastic spring contacts simultaneously by scolding tin with the second copper film electrode with the described first copper film electrode and is connected.
Further, described over-current protection input is made of the stiff end of described elastic spring.
Further, contact is connected with a discharge tube on the described overvoltage protection input, and described discharge tube is arranged on the described bracing frame, and described over-current protection input is connected with a semistor.Concrete, the other end of described semistor is connected with an interior lines input.
Perhaps; described bracing frame is provided with an overvoltage overcurrent protection integrated circuit; described overvoltage overcurrent protection integrated circuit has an overvoltage protection wiring pin and a radiating surface at least; described overvoltage protection wiring pin and described overvoltage protection input are electrically connected; one end of a described over-current protection input and a sample resistance is electrically connected, and described radiating surface is connected with described overvoltage protection input contact.Concrete, described overvoltage overcurrent protection integrated circuit has a pin to be connected with the other end of sample resistance again, is connected with an interior lines input again simultaneously.
Further, the other end ground connection of described discharge tube connects.Further, the other end of described discharge tube is connected with a temperature detect switch (TDS), and the other end of described temperature detect switch (TDS) is connected with a FS signal output part.
Further, described overvoltage overcurrent protection integrated circuit has a grounding pin at least, and described grounding pin ground connection connects.Further, the grounding pin of described overvoltage overcurrent protection integrated circuit is connected with a temperature detect switch (TDS), and the other end of described temperature detect switch (TDS) is connected with a FS signal output part.
Further; discharge tube described in the utility model, semistor, overvoltage overcurrent protection integrated circuit, temperature detect switch (TDS) and elastic spring all adopt known technology of the prior art; about discharge tube, semistor, overvoltage overcurrent protection integrated circuit, temperature detect switch (TDS) and elastic spring known technology in the prior art have been well known to those of ordinary skill in the art, so do not repeat them here.
Operation principle of the present utility model is: the outside line input; the overvoltage protection input; over-current protection input and described elastic spring constitute hilted broadsword on-off switch structure; under the normal condition; elastic spring and outside line input; the overvoltage protection input keeps in touch; when overvoltage overcurrent incident takes place; utilize the discharge heat of discharge tube or overvoltage overcurrent protection integrated circuit that elastic spring is separated with the overvoltage protection input with the outside line input; realize outside line input open circuit; concrete; utilize the discharge heat of discharge tube or overvoltage overcurrent protection integrated circuit to make the melts soldering tin that connects elastic spring, elastic spring is realized separating under elastic reaction.
The utility model and prior art contrast, and effect is positive and tangible.During the utility model work, the big electric current tie point of only flowing through, and do not pass through elastic spring, do not exist elastic spring because of the overheated possibility that causes elastic loss, in addition, outside line input open circuit and implement the alarm action can collaborative work, the reliability height, the utility model is realized simple, and the different structure Security Unit is had stronger adaptive capacity.
Description of drawings:
Fig. 1 is the circuit function structural representation of first embodiment of a kind of open-circuit protecting device that is used for Security Unit of the utility model.
Fig. 2 is the circuit function structural representation of second embodiment of a kind of open-circuit protecting device that is used for Security Unit of the utility model.
Fig. 3 is the forward structure schematic diagram of first preferred embodiment of a kind of open-circuit protecting device that is used for Security Unit of the utility model.
Fig. 4 is the side direction structural representation of first preferred embodiment of a kind of open-circuit protecting device that is used for Security Unit of the utility model.
Embodiment:
As shown in Figure 1; a kind of open-circuit protecting device that is used for Security Unit of the utility model; by at least one outside line input 1; at least one overvoltage protection input 2; at least one over-current protection input 3; at least one elastic spring 4 and at least one bracing frame 7 constitute; wherein; described outside line input 1 and overvoltage protection input 2 all are arranged on the described bracing frame 7; described elastic spring 4 has a stiff end and a movable end; described stiff end is fixedly installed on the described bracing frame 7; described movable end contacts simultaneously with overvoltage protection input 2 with described outside line input 1 and is connected, and described elastic spring 4 is electrically connected with described over-current protection input 3.
In embodiment of the present utility model shown in Figure 1, contact is connected with a discharge tube 6 on the described overvoltage protection input 2, described discharge tube 6 is arranged on the described bracing frame 7, and described over-current protection input 3 is connected with a semistor 5.Concrete, the other end of described semistor 5 is connected with an interior lines input.
Further, the other end ground connection of described discharge tube 6 connects.Further, the other end of described discharge tube 6 is connected with a temperature detect switch (TDS), and the other end of described temperature detect switch (TDS) is connected with a FS signal output part.
As shown in Figure 3 and Figure 4, in embodiment of the present utility model shown in Figure 1, bracing frame 7 is made of printed circuit board (PCB), described outside line input 1 is made of one first copper film electrode, described overvoltage protection input 2 is made of one second copper film electrode, described first copper film electrode and the described second copper film electrode all are arranged on the surface of described printed circuit board (PCB), the stiff end of described elastic spring 4 is fixedly installed on the described printed circuit board (PCB), and the movable end of described elastic spring contacts simultaneously by scolding tin with the second copper film electrode with the described first copper film electrode and is connected.
Further, described over-current protection input 3 is made of the stiff end of described elastic spring 4.
In embodiment of the present utility model shown in Figure 2; described bracing frame 7 is provided with an overvoltage overcurrent protection integrated circuit 8; described overvoltage overcurrent protection integrated circuit 8 has an overvoltage protection wiring pin and a radiating surface at least; described overvoltage protection wiring pin and described overvoltage protection input 2 are electrically connected; described radiating surface is connected with described overvoltage protection input 2 contacts; one end of a described over-current protection input 3 and a sample resistance is electrically connected; simultaneously; described overvoltage overcurrent protection integrated circuit 8 has a pin to be connected with the other end of described sample resistance again, and is connected with an interior lines input simultaneously.
Described overvoltage overcurrent protection integrated circuit 8 has a grounding pin at least, and described grounding pin ground connection connects.Further, the grounding pin of described overvoltage overcurrent protection integrated circuit 8 is connected with a temperature detect switch (TDS), and the other end of described temperature detect switch (TDS) is connected with a FS signal output part.
In embodiment of the present utility model illustrated in figures 1 and 2, on two tie-in lines of communication conductor, be respectively arranged with an open-circuit protecting device that is used for Security Unit of the present utility model.
Claims (8)
1; a kind of open-circuit protecting device that is used for Security Unit; by at least one outside line input; at least one overvoltage protection input; at least one over-current protection input; at least one elastic spring and at least one bracing frame constitute; it is characterized in that: described outside line input and overvoltage protection input all are arranged on the described bracing frame; described elastic spring has a stiff end and a movable end; described stiff end is fixedly installed on the described bracing frame; described movable end contacts simultaneously with the overvoltage protection input with described outside line input and is connected, and described elastic spring and described over-current protection input are electrically connected.
2; the open-circuit protecting device that is used for Security Unit as claimed in claim 1; it is characterized in that: described bracing frame is made of printed circuit board (PCB); described outside line input is made of one first copper film electrode; described overvoltage protection input is made of one second copper film electrode; described first copper film electrode and the described second copper film electrode all are arranged on the surface of described printed circuit board (PCB); the stiff end of described elastic spring is fixedly installed on the described printed circuit board (PCB), and the movable end of described elastic spring contacts simultaneously by scolding tin with the second copper film electrode with the described first copper film electrode and is connected.
3; the open-circuit protecting device that is used for Security Unit as claimed in claim 1; it is characterized in that: contact is connected with a discharge tube on the described overvoltage protection input; described discharge tube is arranged on the described bracing frame, and described over-current protection input is connected with a semistor.
4; the open-circuit protecting device that is used for Security Unit as claimed in claim 1; it is characterized in that: described bracing frame is provided with an overvoltage overcurrent protection integrated circuit; described overvoltage overcurrent protection integrated circuit has an overvoltage protection wiring pin and a radiating surface at least; described overvoltage protection wiring pin and described overvoltage protection input are electrically connected, and described radiating surface is connected with described overvoltage protection input contact.
5, the open-circuit protecting device that is used for Security Unit as claimed in claim 3 is characterized in that: the other end ground connection of described discharge tube connects.
6, the open-circuit protecting device that is used for Security Unit as claimed in claim 4 is characterized in that: described overvoltage overcurrent protection integrated circuit has a grounding pin at least, and described grounding pin ground connection connects.
7, the open-circuit protecting device that is used for Security Unit as claimed in claim 5 is characterized in that: the other end of described discharge tube is connected with a temperature detect switch (TDS).
8, the open-circuit protecting device that is used for Security Unit as claimed in claim 6 is characterized in that: the grounding pin of described overvoltage overcurrent protection integrated circuit is connected with a temperature detect switch (TDS).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420022781 CN2713708Y (en) | 2004-05-17 | 2004-05-17 | Open loop protection device for safety unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420022781 CN2713708Y (en) | 2004-05-17 | 2004-05-17 | Open loop protection device for safety unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2713708Y true CN2713708Y (en) | 2005-07-27 |
Family
ID=34870594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420022781 Expired - Lifetime CN2713708Y (en) | 2004-05-17 | 2004-05-17 | Open loop protection device for safety unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2713708Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100440669C (en) * | 2004-05-17 | 2008-12-03 | 上海凯青通信配件有限公司 | Open-circuit protector for security unit |
-
2004
- 2004-05-17 CN CN 200420022781 patent/CN2713708Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100440669C (en) * | 2004-05-17 | 2008-12-03 | 上海凯青通信配件有限公司 | Open-circuit protector for security unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20081203 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |