CN2528097Y

CN2528097Y - Earth leakage protective plug

Info

Publication number: CN2528097Y
Application number: CN 02218281
Authority: CN
Inventors: 章祖德
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-01-08
Filing date: 2002-01-08
Publication date: 2002-12-25
Anticipated expiration: 2012-01-08

Abstract

Disclosed is a plug with current leakage protection, belonging to a low voltage electrical apparatus, which is composed of a base 17, an upper cover 1, a terminal 19, a pair of moving contacts 15, a pin 14, a terminal protecting cover 18, a transformer 22, a circuit board 4 and a leakage current automatic breaking off mechanism which is composed of a base 12, a coil 27, a magnetic yoke 6, a spring 26, an iron core 7, a lock fastener 10, a cross arm 11, a spring 3 and a push rod 2. As adopting the above design, the structure is simplified, the convenience of the assemble is improved, and the size is reduced.

Description

Leakage protecting plug

The utility model relates to a kind of leakage protecting plug, belongs to low-voltage electrical apparatus.

Plug in the conventional low-voltage electrical apparatus because it does not possess creepage protection function is arranged, therefore, when occurring with its electrical appliance that is connected generation electric leakage, easily jeopardizes personal safety.So, because of the electrical appliance electric leakage causes the example of all kinds of accidents not rarely seen.Certainly; also there is production firm that the electric leakage automatic disconnection mechanism (claiming automatic switch again) in the residual current circuit breaker is transplanted in plug; so that plug is given creepage protection function; but because there is multiple matching relationship in the structure of the electric leakage automatic disconnection mechanism of compositions such as moving part bearing, frame, lever; cause complex structure; bulky, be unwell to the application on the plug of small size.

Task of the present utility model is simple in structure, easy to assembly, the leakage protecting plug that volume is little that a kind of automatic disconnection mechanism of leaking electricity will be provided.

Task of the present utility model is finished like this; a kind of leakage protecting plug; by base 17; loam cake 1; binding post 19; a pair of moving contact 15; pin 14; binding post protecting cover 18; instrument transformer 22; circuit board 4; electric leakage automatic disconnection mechanism forms; described electric leakage automatic disconnection mechanism is by pedestal 12; coil 27; yoke 6; spring 26; iron core 7; snap close 10; transverse arm 11; spring 3; push rod 2 constitutes; pedestal 12 places in the cavity volume of base 17; coil 27 is positioned at yoke 6; yoke 6 is located on the pedestal 12; spring 26 is nested with on iron core 7; one end of iron core 7 is inserted in the coil 27; the other end matches with a side of snap close 10; the opposite side of snap close 10 is corresponding to the bottom of transverse arm 11 central authorities; transverse arm 11 is located on the pedestal 12 movably; its middle part offers push-rod hole 35, and its two end contacts with a pair of moving contact 15 respectively, and spring 3 is placed on the push rod 2; push rod 2 inserts push-rod hole 35, and corresponding with snap close 10 in transverse arm 11 center bottom.

The utility model simplifies the structure owing to adopted above-mentioned design, has improved the convenience of fit on, the little volume of having changed.

Below in conjunction with accompanying drawing the utility model is further described below.

Accompanying drawing is the utility model assembling assumption diagram.

Be shaped on transverse arm groove 23 on the pedestal 12 of the present utility model, transverse arm 11 is located on the transverse arm groove 23, and can be up and down along transverse arm groove 23.In active procedure, drive contact 16 on a pair of moving contact 15 that is in contact with it by two ends of transverse arm 11 and contact with contact 13 on the pin 14 or disconnect.

Have a pair of card base 36,8 on the snap close 10 of the present utility model, form a bayonet socket 25 between a pair of card base 36.The neck 28 of iron core 7 places on the bayonet socket 25, to realize cooperating of iron core 7 and snap close 10.

The bottom part of push rod 2 of the present utility model is provided with card base groove 34, and card base groove 34 is corresponding with a pair of card base 8.Under external force, push rod 2 moves down, and the card base groove 34 of its bottom part is at the lucky a pair of card base 8 corresponding to snap close 10 in the bottom of transverse arm 11 central authorities.

The utility model assembles like this, three binding posts 19 of live wire, zero line, ground wire of will being used to continue are fixedly arranged in an end end of base 17, and be connected with the base portion of a pair of moving contact 15 after the center through hole of instrument transformer 22 going here and there by couple of conductor 21, and and then continue to circuit board 4, pin 14 passed pin holes 20 and be fixedly arranged in the other end of base 17, and guarantee that the contact 13 on the pin 14 is corresponding with the contact 16 on the moving contact 15, with screw binding post protecting cover 18 and base 17 are rotated with.The a pair of lead-out wire of instrument transformer 22 is connected with circuit board 4 by lead.With pedestal 11 build-ins in the cavity volume of base 17, coil 27, yoke 6 place in the cavity volume 24 of pedestal 12, the a pair of exit of coil 27 continues to circuit board 4, an end that is nested with the iron core 7 of spring 26 is inserted in the central authorities of coil 27, the other end of iron core 27 places on the bayonet socket 25 by its neck 28, realize the binding of iron core 27 and snap close 10 1 sides by this, the opposite side of snap close 10 is then corresponding with the push-rod hole 5 and the push rod 2 behind the push-rod hole 35 on the transverse arm 11 of going here and there in regular turn on the oversampling circuit plate 4 at lock buckling groove 9 places of the bottom of transverse arm 11 central authorities.Specifically be that a pair of card base 8 by snap close 10 snaps in or the card base groove 34 that breaks away from push rod 2 bottom parts realizes that the top of push rod 2 is corresponding to the reset button on the loam cake 1 33.Also be preset with test button guard shield 32 and indicator light guard shield 31 on loam cake 1, they correspond respectively to test button 30 and indicator light 29 on the circuit board 4.As soon as above-mentioned parts assembling finishes, just loam cake 1 and base 17 are fixed with hold-down screw.

The utility model is to embody like this that it is earth leakage protective, push reset button 33, make push rod 2 overcome the active force of spring 3 and move down, at this moment, owing to be in power failure state, therefore snap close 10 displacement to the right under the elastic force effect of spring 26, a pair of card base 8 on it is just snapped in the card base hole 34, after removing external force, because a pair of card base 8 has snapped in the card base groove 34, therefore, when under the restoring force effect of push rod 2 at spring 3 when mobile up, just asking transverse arm 11 to move on together by snap close 10, it is outstanding with the contact 13 on the pin 14 to make two ends of transverse arm 11 mention a pair of moving contact 15, and power supply is just connected; When the consumer electronics that is connected with the utility model produces electric leakage or when pressing leakage current of test button 32 simulations; because instrument transformer 22 is a zero sequence current mutual inductor; therefore; instrument transformer 22 is just exported a signal; after being installed on the electric elements processing on the circuit board 4, impel iron core 7 adhesives; at this moment; iron core 7 pulling snap closes 10 are towards left dislocation; the a pair of card base 8 of snap close 10 is deviate from from the card base groove 34 of push rod 2; push rod 2 pops up under the active force of spring 3; just move down along transverse arm groove 23 thereupon transverse arm 11; under the bounce effect of moving contact 15, restPose, separate with the contact 13 on the pin 14 contact 16 of promptly a pair of moving contact 15; thereby cut off the electricity supply, reach the earth leakage protective purpose.

Claims

1; a kind of leakage protecting plug; by base (17); loam cake (1); binding post (19); a pair of moving contact (15); pin (14); binding post protecting cover (18); instrument transformer (22); circuit board (4); electric leakage automatic disconnection mechanism forms; it is characterized in that described electric leakage automatic disconnection mechanism is by pedestal (12); coil (27); yoke (6); spring (26); iron core (7); snap close (10); transverse arm (11); spring (3); push rod (2) constitutes; pedestal (12) places in the cavity volume of base (17); coil (27) is positioned at yoke (6); yoke (6) is located on the pedestal (12); the end that spring (26) is nested with at iron core (7) upper core (7) is inserted in the coil (27); the other end matches with a side of snap close (10); the opposite side of snap close (10) is corresponding to the bottom of transverse arm (11) central authorities; transverse arm (11) is located on the pedestal (12) movably; its middle part offers push-rod hole (35); its two end contacts with a pair of moving contact (15) respectively; spring (3) is placed on the push rod (2); push rod (2) inserts push-rod hole (35), and corresponding with snap close (10) in transverse arm (11) center bottom.

2, leakage protecting plug according to claim 1 is characterized in that being shaped on the pedestal (12) transverse arm groove (23).

3, leakage protecting plug according to claim 1 is characterized in that having a pair of card base (36), (8) on the snap close (10), forms a bayonet socket (25) between a pair of card base (36).

4, leakage protecting plug according to claim 1 is characterized in that the bottom part of push rod (2) is provided with card base groove (34), and card base groove (34) is corresponding with a pair of card base (8).