CN2149694Y - Multi-function safety plug - Google Patents
Multi-function safety plug Download PDFInfo
- Publication number
- CN2149694Y CN2149694Y CN 93206522 CN93206522U CN2149694Y CN 2149694 Y CN2149694 Y CN 2149694Y CN 93206522 CN93206522 CN 93206522 CN 93206522 U CN93206522 U CN 93206522U CN 2149694 Y CN2149694 Y CN 2149694Y
- Authority
- CN
- China
- Prior art keywords
- safety plug
- plug
- triode thyristor
- bidirectional triode
- resistance
- 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.)
- Expired - Fee Related
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Abstract
The utility model provides a multi-function safety plug to meet requirements of the safe operation of various electric appliances. The safety plug is realized by that the inner part of the plug is additionally provided with a protective tube and an overvoltage protection element. As a consequence, the multi-function safety plug has functions of over-current protection and overvoltage protection. When the power supply voltage reaches the rated voltage protection value of the safety plug, the safety plug can cut off the power supply in time to protect the safety of the electric appliances.
Description
The utility model has related to electrical connector, specifically a kind of plug with overvoltage, overcurrent protection function.Be applicable to being connected of electrical appliance and power supply.
Present universal use along with electrical appliance.To the protection of electrical appliance shown more and more important, to the common components of power consumption equipment---the improvement and the renewal of attaching plug function have become the heat subject of people's research.Number of patent application 93200365.6 once disclosed a kind of plug with overvoltage and overcurrent protection function; promptly " multifunctional protecting plug " this plug is assembled in plug inside with a bidirectional triode thyristor, a resistance and a protective tube; can play overvoltage and overcurrent protection; device is reusable, and is practical.But, the over-voltage protection element bidirectional triode thyristor by and conducting be that electric current by the resistance of flowing through decides, in resistance branch, exist electric current all the time, influence the useful life of bidirectional triode thyristor, and cause misoperation easily, unfavorable to protective circuit.
The purpose of this utility model is to release a kind of can the repeated use in circuit, do not produce misoperation, does not produce the multifunctional protecting plug of power consumption so that safety plug is able to higher generalization and use under normal power supply voltage.
Design of the present utility model is to utilize the voltage-sensitive characteristic of piezo-resistance and the characteristic of switch of bidirectional triode thyristor to realize overvoltage protection.
Task of the present utility model realizes by an electric current protective tube, a bidirectional triode thyristor, a piezo-resistance and a diode are installed in plug inside.The conducting of bidirectional triode thyristor with by controlling by gate trigger current.As long as change gate trigger current just can change bidirectional triode thyristor end with conducting to satisfy the needs of protective circuit.The utility model is serially connected in the electric current protective tube in the power circuit, two anodes of bidirectional triode thyristor are attempted by the load two ends, piezo-resistance one termination gate pole, one end of the other end and diode joins, another termination anode of diode, utilize conducting that the variation of supply voltage changes piezo-resistance and end, the trigger current that utilizes gate pole with bidirectional triode thyristor by connecting with conducting and mains voltage variations.Because the nonlinear characteristic of piezo-resistance; under normal working voltage, be in cut-off state; gate pole does not have electric current to flow through; during the magnitude of voltage that has only voltage to be elevated to need protection, the piezo-resistance conducting, trigger current passes through gate pole; bidirectional triode thyristor conducting, short circuit; short circuit current blowout current protective tube is cut off the electricity supply, thereby has protected electrical appliance.Diode in the utility model is provided with for the misoperation that the pulse in the power supply and surge current cause in order to prevent the high sensitivity bidirectional triode thyristor.
The utility model has prolonged the life-span of over-voltage protection element owing to adopted piezo-resistance and bidirectional triode thyristor as over-voltage protection element, and is safe and reliable, at AC and DC, all can use under the high and low voltage, helps the popularization and the use of safety plug.
Electric current protective tube in the utility model adopts socket connection.Be convenient to change, bidirectional triode thyristor, piezo-resistance, diode adopt screw to connect or welding.
Specific embodiment of the utility model is provided by following accompanying drawing:
Fig. 1 is circuit theory diagrams of the present utility model
Fig. 2 is an internal structure schematic diagram of the present utility model
As Fig. 1,2:(1) be the electric current protective tube, (2) be piezo-resistance, (3) be diode, (4) be bidirectional triode thyristor, (5) are pin, and (6) (7) are terminal screw, piezo-resistance (2) one terminates on the gate pole G of bidirectional triode thyristor (4), another terminating diode (3), on the anode A 2 of another termination bidirectional triode thyristor (4) of diode (3), two anodes of bidirectional triode thyristor (4) are connected on terminal screw (6), (7).The power supply lead wire of load (not drawing among the figure) is connected on respectively on terminal screw (6), (7).Supply voltage just often; piezo-resistance (2) is ended, and does not have trigger current, and bidirectional triode thyristor (4) ends; power supply is by pin (5) electric current protective tube (1); terminal screw (6), (7) are to the electrical appliance normal power supply, when supply voltage raises when reaching setting piezo-resistance (2) conducting for some reason; bidirectional triode thyristor (4) conducting that is triggered; form short circuit, short circuit current blowout current protective tube (1) is cut off the electricity supply, and has protected electrical appliance.
Claims (1)
1, a kind of safety plug that contains overcurrent protection is characterized in that also being equipped with in the plug piezo-resistance (2), diode (3), the over-voltage protection element that bidirectional triode thyristor (4) is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93206522 CN2149694Y (en) | 1993-03-22 | 1993-03-22 | Multi-function safety plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93206522 CN2149694Y (en) | 1993-03-22 | 1993-03-22 | Multi-function safety plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2149694Y true CN2149694Y (en) | 1993-12-15 |
Family
ID=33789507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93206522 Expired - Fee Related CN2149694Y (en) | 1993-03-22 | 1993-03-22 | Multi-function safety plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2149694Y (en) |
-
1993
- 1993-03-22 CN CN 93206522 patent/CN2149694Y/en not_active Expired - Fee Related
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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 |