CN2141129Y - Automatic safety leakage-protective plug - Google Patents
Automatic safety leakage-protective plug Download PDFInfo
- Publication number
- CN2141129Y CN2141129Y CN 92226343 CN92226343U CN2141129Y CN 2141129 Y CN2141129 Y CN 2141129Y CN 92226343 CN92226343 CN 92226343 CN 92226343 U CN92226343 U CN 92226343U CN 2141129 Y CN2141129 Y CN 2141129Y
- Authority
- CN
- China
- Prior art keywords
- relay
- protective plug
- closed contacts
- pairs
- utmost point
- 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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- Details Of Connecting Devices For Male And Female Coupling (AREA)
Abstract
The utility model relates to an automatic safety leakage-protective plug. The utility model is characterized in that a plug which is provided with three electrodes is directly and electrically connected with a relay which is provided with two normally closed contacts, the relay is also provided with a spacing button which can automatically cut off the power supply when an outer shell of an electric appliance leaks. The automatic safety leakage-protective plug can effectively protect the human safety of a user and the service life of electric appliances.
Description
The utility model belongs to the plug that directly has earth leakage protective device that compact electric apparatus equipment is used.
We in daily life and work employed compact electric apparatus equipment as refrigerator, electric fan, washing machine, water heater, electric hand drill etc., often insulation is bad causes the electric leakage of its housing that electrical equipment itself is suffered damage because of self, even causes user's loss of life or personal injury.Though existing plug with three utmost points can play the effect of protection personal safety now, be unfavorable for eliminating the electric leakage reason, poor stability.Because of its protection philosophy is that the formation short circuit is cut off the electricity supply or fuse protection automatically by the air switch in the circuit after utilizing the electrical appliance outer casing electrification, these two kinds of protections all need the regular hour just can cut off the electricity supply.
The invention the purpose of this utility model just is to force the user must get rid of the electric leakage reason, shortens to cut off the electricity supply the needed time, with the personal safety of guaranteeing the user and the useful life of electrical equipment itself.
This electric leakage automatic safe protective plug promptly directly is electrically connected the relay with two pairs of long closed contacts, and a spacing operating key is housed in employed relay on the plug with three utmost points.When charged for a certain reason and voltage reaches 36V-220V when the electrical appliance shell, relay moves immediately two pairs of long closed contacts is disconnected, at this moment spacing operating key stops two pairs of long closed contacts to be connected once more, make the dump of electrical appliance and quit work, and whole power consumption equipment does not have electric current to pass through.Only after leaky is eliminated, two pairs of long closed contacts reclose during by the lower limit operating key by the people, and the electricity of power supply just can enter electrical appliance and begin operate as normal.For make electric leakage automatic safe protective plug reduce volume and reduce cost as far as possible, what employed relay was selected for use is JJDZ series relay.For this relay can be used in AC network, on relay, must be connected in series a diode and carry out rectification.
Compare the utility model with existing plug and can cut off the electricity supply immediately when the electrical appliance outer casing electrification, so security reliability is strong with three utmost points.Since the long closed contact of spacing button control is arranged in the relay, the connection that before the electric leakage reason is not eliminated, can not reset, and this just forces people must search the electric leakage reason, again can operate as normal by lower limit operating key electrical appliance after getting rid of.If do not get rid of the electric leakage reason, by the lower limit operating key, relay will repeat to disconnect action to be continued to cut off the electricity supply.So just guaranteed the useful life of personal safety and electrical appliance.
Describe below in conjunction with drawings and Examples.
Fig. 1 is the electrical schematic of electric leakage automatic safe protective plug.
Fig. 2 is the structural representation of electric leakage automatic safe protective plug.Wherein (1), (2), (3) be the ground wire utmost point of the utility model plug successively, the live wire utmost point and the zero line utmost point, (4) be diode, (5) be relay, (6) extension spring of relay, (7) be the contact piece clamper of relay, (8) be spacing button, (9) stage clip, (10), (11) be two pairs of long closed contacts, (12) are guide pillars, (15), (14), (13) be the contact that is connected to electrical appliance shell and electrical appliance load two ends successively, (16) be relay1 case, (17) are the electrical appliance shells, and (18) are the electrical appliance loads, (19) be relay coil, (20) are insulating bases.One end of relay coil (19) is electrically connected with electrical appliance shell (17) by contact (15), other end serial connection diode (4) back is electrically connected with the ground wire utmost point (1), one end of two pairs of long closed contacts (10), (11) is electrically connected with electrical appliance load (18) two ends by contact (13), (14) respectively, and the other end is connected to the live wire utmost point (2) and the zero line utmost point (3) respectively.
When three utmost points of electric leakage automatic safe protective plug insert in the socket of electrical networks, because contact (13), (14) are connected on electrical appliance load (18) two ends respectively, contact (15) is connected on the electrical appliance shell (17).Electrical appliance shell this moment (17) is if then electrical appliance load of leakproof (18) is in normal operating conditions.For a certain reason when if the charged and voltage of electrical appliance shell (17) reaches 36V-220V, when then should electricity flowing to the ground wire utmost point (1) through relay (5), make its inner iron core produce magnetic force owing to relay coil (19) is charged, and the contact piece clamper (7) in the attraction relay, to make this clamper in Fig. 20 execute clockwise then be close to the relay coil end, two pairs of long closed contacts (10), (11) disconnect at this moment, and then power supply cuts off automatically.When the contact piece clamper (7) in the relay is held by the electromagnet in the relay coil (19), spacing button (8) moves up at the effect lower edge of stage clip (9) guide pillar (12), the A face of contact contact piece clamper (7) can not be rotated counterclockwise the contact piece clamper and resets.At this moment electrical appliance is in power supply all the time and is cut off state and can not works.The user can search the electric leakage reason and carry out eliminating work this moment.If do not get rid of the electric leakage reason, by lower limit button (8), relay (5) will repeat aforementioned activities and continue to cut off the electricity supply.After getting rid of, the electric leakage reason presses lower limit button (8) again, owing to do not have leakage current to pass through in the relay coil (19), the contact piece clamper (7) in the relay was rotated counterclockwise under will the effect of extension spring in relay (6) and resetted this moment, make two pairs of long closed contacts (10), (11) closed and connect circuit, make electrical appliance enter operate as normal.
Claims (3)
1, a kind of electric leakage automatic safe protective plug with three utmost points; it is characterized in that: at three utmost points is that the ground wire utmost point (1), the live wire utmost point (2), the zero line utmost point (3) upward directly are electrically connected the relay (5) with two pairs of long closed contacts; wherein an end of relay coil (19) is electrically connected with electrical appliance shell (17); one end of two pairs of long closed contacts (10), (11) is connected to the live wire utmost point (2) and the zero line utmost point (3) respectively, and the other end is electrically connected on the two ends of load (18) respectively.
2, electric leakage automatic safe protective plug according to claim 1 is characterized in that: a spacing button (8) is housed in the relay with two pairs of long closed contacts (5).
3, electric leakage automatic safe protective plug according to claim 1 is characterized in that: the relay (5) with two pairs of long closed contacts is meant JJDZ series relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92226343 CN2141129Y (en) | 1992-06-27 | 1992-06-27 | Automatic safety leakage-protective plug |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 92226343 CN2141129Y (en) | 1992-06-27 | 1992-06-27 | Automatic safety leakage-protective plug |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2141129Y true CN2141129Y (en) | 1993-08-25 |
Family
ID=33770671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 92226343 Expired - Fee Related CN2141129Y (en) | 1992-06-27 | 1992-06-27 | Automatic safety leakage-protective plug |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2141129Y (en) |
-
1992
- 1992-06-27 CN CN 92226343 patent/CN2141129Y/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 |