CN2071854U - Thermal open-circuit type thermistor safety unit - Google Patents
Thermal open-circuit type thermistor safety unit Download PDFInfo
- Publication number
- CN2071854U CN2071854U CN 90205563 CN90205563U CN2071854U CN 2071854 U CN2071854 U CN 2071854U CN 90205563 CN90205563 CN 90205563 CN 90205563 U CN90205563 U CN 90205563U CN 2071854 U CN2071854 U CN 2071854U
- Authority
- CN
- China
- Prior art keywords
- discharge tube
- thermistor
- ground connection
- hot melt
- fixation plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Images
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model relates to a thermal open circuit type thermistor safety unit. The original safety unit can be improved, and a thermistor with a self recovering function and an electric discharge tube are used as primary elements; when the utility model meets high current, the thermistor changes quickly, an outside line approximates the off condition, the over current phenomenon can be controlled, the electric discharge tube discharges the electricity and is switched on, and heavy current can be led in a ground line. If the touching time is shorter, after the electric discharge tube discharges the electricity, the electric discharge tube can recover by self. When the undercurrent and the current are over, heat can be transferred to a hot melt block through the electric discharge and the heating, the hot melt block can be melted, an inside line is opened, the outside line is grounded, and the audible and visual alarm can be sent out. The utility model replaces the original safety unit and is arranged at a needle type safety seat of a main distribution frame of a telephone exchange machine to have a protective function on the machine in a telephone exchange office.
Description
Hot melt open type thermistor Security Unit relates to a kind of security personnel's device that is installed on the telephone exchange main frame pin type safety seat, and it plays subscribers feeder when meeting thunderbolt, forceful electric power induction or meeting 220 volts of interchanges, 600 volts of direct currents, undercurrent, overcurrent to switch and other calculator room equipment, personal safety protection effect.
The Security Unit that the producer of at present domestic all production Security Units and our factory are produced and the patent application of relevant Security Unit; various harmful power supplys are invaded circuit can both play the certain protection effect; but main element is a consumable accessory; heat coil, fusible link etc. all can not runbacks; use the back will change element, make troubles and economic loss at once to the user.
" 89202989.7 hot melt open type Security Unit ", 90201799.3 " Millisecond hot melts three insurance Security Units " through updating, can play a protective role by quick fuse, but main element all can not runback, need could continue use after the transposing again.
The purpose of this utility model is to provide a kind of hot melt open type thermistor Security Unit; remove high voltage, heavy current, overcurrent, can cut off the electricity supply when undercurrent influences; outside automatic sound-light alarm played a protective role, main element is runback automatically, helped using and keeping in repair of user.
The utility model is achieved in that hot melt open type thermistor Security Unit, adopt the element of runback automatically, thermistor (being PTC) and discharge tube, PTC links by external fixation plate and long pin (outside line), contact with the outer aluminium cover of hot melt piece by internal fixation plate, discharge tube one end is close to the hot melt piece, end is close to ground connection alarm combination in addition, link by printed circuit board (PCB) and grounding shaft, short pin (interior lines) links by printed circuit board (PCB) and spring base, spring, aluminium cover, hot melt piece, discharge tube, ground connection alarm combination, grounding shaft.Utilize the accumulation of long-time heating of PTC and discharge tube discharge temp to make the fusing of hot melt piece, spring promotes the aluminium cover and contacts with ground connection alarm combination, and finishes the purpose of ground connection and alarm by printed circuit board (PCB).
Fig. 1, structural representation of the present utility model:
Light-emitting diode (1), resistance (2), printed circuit board (PCB) (3), dividing plate (4), shell (5), ground connection alarm combination (6), external fixation plate (7), thermistor (8), internal fixation plate (9), discharge tube (10), long pin (11), hot melt piece (12), aluminium cover (13), spring (14), base (15), spring base (16), insulating trip (17), alarm sheet (18), grounding shaft (19), alarming axis (20).
The left view of Fig. 2, Fig. 1:
Short pin (21).
Fig. 3, ground connection alarm combination schematic diagram:
Epoxy plate (6-1), alarm contact (6-2), ground connection Copper Foil (6-3).
The left view of Fig. 4, Fig. 3:
Fig. 5, electrical schematic diagram of the present utility model.
Below in conjunction with accompanying drawing embodiment of the present utility model is further described:
With reference to Fig. 1,2, on inside and outside fixed head (9), (7) salient point is arranged, thermistor (8) is close on the salient point of internal and external fixation (9), (7), there is the space centre, is convenient to distributing of heat, hot melt piece (12) material is a low temperature scolding tin, is with aluminium cover (13) outward, on aluminium cover (13) lateral surface contact is arranged, upper and lower aluminium cover (13) is symmetrically distributed, and top one side of internal fixation plate (9) has the contact to contact with last aluminium cover (13).
With reference to Fig. 3,4, be pasted with ground connection Copper Foil (6-3) at epoxy plate (6-1) two faces, ground connection Copper Foil (6-3) external fixation has alarm contact (6-2) to constitute ground connection alarm combination (6).
Light-emitting diode (1), resistance (2) are fixed on the printed circuit board (PCB) (3).
By shown in Figure 1, thermistor (8) is close to the salient point on inside and outside fixed head (9), (7), thermistor (8) is connected by external fixation plate (7) and long pin (11) (connecing outside line), be connected by contact on the internal fixation plate (9) and last aluminium cover (13), the centre is placed with the dividing plate (4) of insulation.Discharge tube (10) one ends are close to ground connection Copper Foil (6-3), be connected by printed circuit board (PCB) (3) and grounding shaft (19), end is close to hot melt piece (12) in addition, be separately fixed in the upper and lower aluminium cover (13), two ends are fixed on the base (15) by spring (14), spring base (16), insulating trip (17), alarm sheet (18) respectively.Short pin (21) (connecing interior lines) links by printed circuit board (PCB) (3) and spring base (16).
Touching 220 volts when outside line exchanges and 500～600 volts of direct currents or be struck by lightning, during the forceful electric power induction, its phenomenon is a current state, make user's current surge, utilize thermistor (8) to change fast, make 10 Ω resistance under the normal condition can rise to 20K, make outside line be similar to open-circuit condition, so over-current phenomenon avoidance is controlled, and discharge tube (10) terminal voltage peak value reaches ignition voltage and discharges, at this moment electric current passes through printed circuit board (PCB) (3) to spring base (16) from short pin (21), spring (14), through aluminium cover (13), hot melt piece (12), discharge tube (10), at this moment discharge tube (10) discharge two ends conducting, by ground connection alarm combination (6), printed circuit board (PCB) (3) passes to grounding shaft (19) heavy current is introduced ground wire.As the time of touching is shorter, and then discharge tube (10) discharge back just can runback.As the time of touching is longer, discharge tube (10) discharge heating, heat is directly passed to the hot melt piece of being close to discharge tube (10) (12), hot melt piece (12) fusing when temperature reaches 70 ℃, and at this moment the outer aluminium cover (13) of discharge tube (10) is subjected to the pressure effect of spring (14).Promoting aluminium cover (13) makes the contact on the aluminium cover (13) contact with ground connection Copper Foil (6-3), alarm contact (6-2), arrive grounding shaft (19) by printed circuit board (PCB) (3) then, with the forceful electric power grounding shunt, alarm contact (6-2) simultaneously and alarm signal is passed to alarm sheet (18), alarming axis (20) by printed circuit, make the alarm bell ring, warning circuit makes the luminous realization audible and visual alarm of light-emitting diode (1) by resistance (2), at this moment the contact on aluminium cover (13) and the internal fixation plate (9) disengages, be the interior lines open circuits, outside line ground connection.
When subscribers feeder touches 220 volts of AC line or long distance subscriber line directly touches AC line indirectly, circuit is at undercurrent, during over-current state, because the resistance variations of thermistor (8) makes over-current phenomenon avoidance controlled, but owing to do not reach the ignition voltage of discharge tube (10), discharge tube (10) can not discharge, then sneak current exists over a long time, thermistor (8) temperature increases in time and improves, the part heat distributes by the salient point gap on the internal fixation plate (9), the part heat is delivered on the lead cover of being close to hot melt piece (12) (13) by the contact on the internal fixation plate (9), when reaching 70 ℃, hot melt piece (12) temperature melts, later course of action is same as described above not to be repeated, i.e. the interior lines open circuit, outside line ground connection, sound and light alarm.
In sum; this Security Unit is to forceful electric power; overvoltage; overcurrent and undercurrent can both make outside line ground connection; the interior lines open circuit; sound and light alarm; can both play a protective role to intra-office equipment and personal safety; and this Security Unit has used thermistor; discharge tube; the element that the runback function is arranged is as main part in addition; also can be repeatedly used in the ordinary course of things and not change; provide great convenience to alleviate user's financial burden again to the user; can replace former all Security Units; be installed on various types of switches, also can play a protective role the switch of the stronger S1240 type of sensitiveness.Can be general on various pin type safety seats.
Claims (4)
1, a kind of hot melt open type thermistor Security Unit that is installed on the telephone exchange distributing frame that relates to, by light-emitting diode (1), resistance (2), printed circuit board (PCB) (3), dividing plate (4), shell (5), ground connection alarm combination (6), discharge tube (10), long pin (11), spring (14), base (15), spring base (16), insulating trip (17), alarm sheet (18), grounding shaft (19), alarming axis (20), short pin (21) is formed, in it is characterized in that thermistor (8) is fixed on, external fixation plate (9), (7) in, discharge tube (10), hot melt piece (12) is placed in the aluminium cover (13), aluminium cover (13) and spring (14), internal fixation plate (9) links, external fixation plate (7) is connected with long pin (11), and short pin (21) is connected by printed circuit board (PCB) (3) and spring base (16).
2, Security Unit according to claim 1 is characterized in that on inside and outside fixed head (9), (7) salient point being arranged, and a side on internal fixation plate (9) top has a contact, and thermistor (8) is fastened on the salient point of inside and outside fixed head (9), (7).
3, Security Unit according to claim 1 is characterized in that on the lateral surface of aluminium cover (13) of upper and lower symmetry the contact being arranged, and last aluminium cover (13) is connected by contact on the internal fixation plate (9) and internal fixation plate (9), and is close to spring (14).
4,, it is characterized in that epoxy plate (6-1) two faces are pasted with ground connection Copper Foil (6-3), ground connection Copper Foil (6-3) external fixation has alarm contact (6-2) to constitute ground connection alarm combination (6) according to claim 1 or 2 or 3 described Security Units.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90205563 CN2071854U (en) | 1990-04-25 | 1990-04-25 | Thermal open-circuit type thermistor safety unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90205563 CN2071854U (en) | 1990-04-25 | 1990-04-25 | Thermal open-circuit type thermistor safety unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2071854U true CN2071854U (en) | 1991-02-20 |
Family
ID=4886309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90205563 Withdrawn CN2071854U (en) | 1990-04-25 | 1990-04-25 | Thermal open-circuit type thermistor safety unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2071854U (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 |
-
1990
- 1990-04-25 CN CN 90205563 patent/CN2071854U/en not_active Withdrawn
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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4661881A (en) | Overload protector for a telephone set | |
| US4486804A (en) | Overload protector for a telephone set | |
| US5029302A (en) | Fail safe gas tube | |
| JPH09233622A (en) | Distribution panel with built-in lightening guard | |
| CN2071854U (en) | Thermal open-circuit type thermistor safety unit | |
| CN106655139B (en) | Surge Protector | |
| CN2143853Y (en) | Automatic alarm fully auto-set safety unit | |
| CN208062780U (en) | Battery pack protection board with short-circuit protection function | |
| CN2702506Y (en) | Novel structural surge protector | |
| CN113131435A (en) | Security device and method | |
| CN2154574Y (en) | Protective device pattern plate | |
| CN2247903Y (en) | Protection unit for safety protector | |
| CN218730781U (en) | Double-protection thermal protection device | |
| CN1052821C (en) | Heat-sensitive self reset device for safety unit | |
| CN2233636Y (en) | Protecting unit | |
| CN2147702Y (en) | Protector for general line distributing | |
| CN2463999Y (en) | Overvoltage and overcurrent protection and warning device for main distributing frame | |
| CN1197277A (en) | Realizing method and device for protecting and warning when resistance of security device losing efficacy | |
| US2756367A (en) | Heavy duty arrester | |
| CN2580651Y (en) | Solid circuit protection unit for main distributing frame | |
| CN2682759Y (en) | A self-reset safety ensuring unit for main distributing frame of urban telephone | |
| CN206422023U (en) | High-voltage electric power system safeties | |
| CN2884640Y (en) | Wholl electronic self-resetting integrated circuit guard cell | |
| CN2323486Y (en) | Distribution frame protector with thermistor failure protection and warning functions | |
| CN113903628A (en) | Preparation method of surge protector capable of resisting high-intensity lightning current |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |