CN2879409Y - Socket type earthing fault circuit breaker with reverse-connection protecting function - Google Patents

Abstract

The utility model relates to a socket type earthing fault circuit breaker comprising a resetting key (1), an movable contact sheet (2) with a T-shape end, a socket pole sheet (4) with an immovable contact sheet (3), a leakage current signal detection circuit, an electromagnetic tripping mechanism and a reverse connection protecting device. A cutting groove (21) is provided at the T-shape end of the movable contact sheet (2) from a front end along an symmetrical axes, a projecting table (712) or a stage (711) is provided on an upper end face of a bracket (71) of a resetting frame (7). Because a pair of contacts at the T-shape end of the movable contact sheet (2) are independent with each other in a vertical direction after the cutting groove (21) is provided, and have a large freedom, after the stage (711) corresponding to postion and direction of the cutting groove (21) is formed on the upper end face of the bracket (71) of the resetting frame (7), and when the bracket (71) lifts one side of the T-shape end of the movable contact sheet (2), the movable contact sheet (2) drives the other side by a portion which is connected with a tail portion of the movable contact sheet, thereby even if a movable contact, an immovable contact, and contacts of a left and a right output sheet are not in a same level, they can have a good contact without phenomena of burning the contacts due to bad contact, and mounting is more convenient.

Description

Socket type earth-fault line-breaker with reverse wiring protection function

Technical field: the utility model relates to a kind of socket type earth-fault line-breaker with reverse wiring protection function.

Background technology: the applicant in the patent No. is: ZL 200420080742.1; Granted publication number is: CN 2743962Y also discloses a kind of socket type earth-fault line-breaker (abbreviating GFCI as) with reverse wiring protection function in the utility model patent of Granted publication on the 30th November in 2005, its structure comprises reset key; a pair of movable contact spring; the a pair of socket pole piece that has static contact; leakaging signal detecting circuit and be subjected to leakaging signal detecting circuit control and the electromagnetic trip mechanism of action and by comprising release link; back-moving spring; reset cradle; reverse resilient support mechanism and electromagnetic trip mechanism and grip tab; the reverse wiring protective device that contact-making switch is formed.On movable contact spring and the static contact respectively rivet clasp moving contact and fixed contact are arranged, the release link tail end is fixedlyed connected with reset key, be provided with ring-type snap close draw-in groove near the other end, back-moving spring is set on the release link, the back-moving spring two ends are against respectively on reset key and the center, reset cradle is a tubular element, bilateral symmetry crosses out trailing arm, movable contact spring is converted into L shaped, one end penetrates on the magnet ring center is inserted at the bottom of the pedestal chamber admittedly, another free end becomes T shape, rivet clasp has a pair of moving contact respectively, free end places respectively between trailing arm and the static contact, the socket type earth-fault line-breaker also is provided with a left side, right output chip, a left side, a right output chip and a left side, right side load wiring mechanism is electrically connected, a left side, right movable contact spring respectively is provided with paired contact, a left side, right output chip and socket pole piece electrical isolation, a left side, right output chip respectively is provided with a contact, contact correspondence on the socket pole piece of a left side on static contact and the left output chip is arranged on the top of left movable contact spring pair of contact, contact correspondence on the right socket pole piece on static contact and the right output chip is arranged on the top of right movable contact spring pair of contact, moving contact and fixed contact and a left side, right output chip contact is relative, release link and reset cradle central through hole are movingly and be inserted in wherein, reverse resilient support mechanism and release link, the coaxial setting of reset cradle, the elastic force direction is relative with release link to constitute flexible restoring organ to the support of reset cradle formation elastic floating; The series arm of contact-making switch and test resistance is connected across the electric leakage signal simulation branch road that constitutes on two inputs, and contact-making switch is pressed the state closure under reset key.The contact of contact-making switch is by the contact moving plate that separates and contact still and forms, and the contact moving plate is fixedly installed on the trailing arm of reset cradle, contacts still and is oppositely arranged on and contacts below the moving plate.In the course of the work, requirement drives about the reset cradle by resetting device according to different situations, the horizontal trailing arm pop-up of reset cradle both sides or leave the free end of movable contact spring contacts a pair of moving contact on the free end respectively simultaneously and separates with fixed contact or left and right output chip contact.But because the free end of movable contact spring becomes T shape, contact still and the structure of movable contact spring riveted joint interlock and the restriction of processing technology, a pair of moving contact on it and fixed contact and left and right output chip contact be difficult to guarantee to be on the same horizontal plane, thus the time regular meeting phenomenon that loose contact occurs burn out the contact and cause the socket type earth-fault line-breaker to lose efficacy; In addition, contact still and the assembling that contacts moving plate also very inconvenience.

The purpose of this utility model is to provide a kind of simple in structure, contact contact earth fault line breaker with reverse wiring protection function reliable, easy to assembly for overcoming the deficiencies in the prior art.

The utility model is that the achieve the above object technical solution that adopted is as follows: a kind of socket type earth-fault line-breaker with reverse wiring protection function; comprise reset key; a pair of movable contact spring with T shape end; the a pair of socket pole piece that has static contact; leakaging signal detecting circuit and be subjected to the control of described leakaging signal detecting circuit and the electromagnetic trip mechanism of action and by comprising release link; back-moving spring; reset cradle; reverse resilient support mechanism and electromagnetic trip mechanism and grip tab; the reverse wiring protective device that contact-making switch is formed; it is characterized in that: described movable contact spring T shape end is provided with grooving from leading section along the axis of symmetry, and the trailing arm upper surface of reset cradle is provided with boss or one-tenth and grooving position and the corresponding step of direction.

Compared with prior art, the beneficial effects of the utility model are: owing to be provided with grooving from leading section along the axis of symmetry at movable contact spring T shape end, the pair of contact of movable contact spring T shape end is separate in vertical direction, the degree of freedom is bigger, behind the trailing arm upper surface one-tenth and grooving position and the corresponding step of direction of reset cradle, when trailing arm wherein pushes up on the side movable contact spring T shape end, movable contact spring drives opposite side by the part that afterbody links to each other, even moving contact and fixed contact and a left side like this, right output chip contact is not on same horizontal plane, also excellent contact can be arranged, can not occur loose contact and burn out the phenomenon of contact; In addition owing to do not had moving contact and fixed contact and the strict demand of left and right output chip contact on same horizontal plane, contact still simultaneously and change into and being fixed on the trailing arm, the contact still is electrically connected with movable contact spring by flexible conductor, so assembles more convenient.

The utility model is described in further detail below in conjunction with accompanying drawing.

Description of drawings:

Accompanying drawing 1 is the utility model specific embodiment schematic appearance;

Accompanying drawing 2 is removed middle base for specific embodiment and is reached with the perspective view behind the top;

Accompanying drawing 3 is along A-A direction cutaway view in the accompanying drawing 1;

Accompanying drawing 4 is analysed and observe trailing arm embodiment 1 schematic diagram in the accompanying drawing 1 along the B-B direction;

Accompanying drawing 5 is analysed and observe trailing arm embodiment 2 schematic diagrames in the accompanying drawing 1 along the B-B direction;

Accompanying drawing 6 is contact still scheme of installation;

Accompanying drawing 7 is the utility model specific embodiment three-dimensional exploded view;

Embodiment:

Shown in Fig. 1～3; the GFCI socket of the utility model specific embodiment still comprises reset key 1; a pair of movable contact spring 2 with T shape end; the a pair of socket pole piece 4 that has static contact 3; leakaging signal detecting circuit and be subjected to the control of described leakaging signal detecting circuit and the electromagnetic trip mechanism of action and by comprising release link 5; back-moving spring 6; reset cradle 7; reverse resilient support mechanism and electromagnetic trip mechanism and grip tab 8; the reverse wiring protective device that contact-making switch is formed; the whole rectangular body of GFCI socket; housing is divided into pedestal 13 and 12 liang of parts of loam cake; be provided with center 14 at pedestal 13 and loam cake 12; loam cake 12 is provided with two groups of socket apertures 15 and 1 one feeler switchs 16 of a reset key; remove contact moving plate 11; contact still 9; outside movable contact spring 2 and the reset cradle 7; the structure of remaining parts and installation site are all same as the prior art; the leakaging signal detecting circuit principle repeats no more too here.As Fig. 2, shown in 3, movable contact spring 2 integral body still are converted into L shaped, one end penetrates on the magnet ring center is inserted at the bottom of pedestal 13 inner chambers admittedly, another free end becomes T shape, there is moving contact on leading section both sides rivet clasp respectively, free end places respectively between trailing arm 71 and the static contact 3, on movable contact spring 2T shape end, be provided with grooving 21 the T shape end of movable contact spring 2 is divided into two slit bamboo or chopped woods from leading section along the axis of symmetry, grooving 21 length are between the 1/2-3/4 of T shape portion total length, trailing arm 71 upper surfaces of reset cradle 7 both sides are provided with boss 712 (as shown in Figure 5) or one-tenth and grooving 21 positions and the corresponding step 711 of direction (as shown in Figure 4), when that is to say two trailing arms 71 with reset cradle 7 pop-ups, boss 712 on the trailing arm 71 or step can only be against on the movable contact spring 2T shape end slit bamboo or chopped wood wherein; Contact still 9 integral body are converted into L shaped or Z-shaped, be fixed on the trailing arm 71, be electrically connected with movable contact spring 2 by flexible conductor 10, the contact of contact still 9 is arranged on trailing arm 71 lower surfaces, the other end is electrically connected with movable contact spring 2 by flexible conductor 10, the contact moving plate 11 be fixed on trailing arm 71 belows, the contact moving plate 11 the contact be arranged on the contact still 9 the contact under, as shown in Figure 6.

Claims (2)

1; a kind of socket type earth-fault line-breaker with reverse wiring protection function; comprise reset key (1); a pair of movable contact spring (2) with T shape end; the a pair of socket pole piece (4) that has static contact (3); leakaging signal detecting circuit and be subjected to the control of described leakaging signal detecting circuit and the electromagnetic trip mechanism of action and by comprising release link (5); back-moving spring (6); reset cradle (7); reverse resilient support mechanism and electromagnetic trip mechanism and grip tab (8); the reverse wiring protective device that contact-making switch is formed; it is characterized in that: described movable contact spring (2) T shape end is provided with grooving (21) from leading section along the axis of symmetry, and trailing arm (71) upper surface of reset cradle (7) is provided with boss (712) or one-tenth and grooving (21) position and the corresponding step of direction (711).

2, the socket type earth-fault line-breaker with reverse wiring protection function according to claim 1; it is characterized in that: described contact still (9) is fixed on the trailing arm (71); contact still (9); be electrically connected with movable contact spring (2) by flexible conductor (10); the contact of contact still (9) is arranged on trailing arm (71) lower surface; contact moving plate (11) is fixed on trailing arm (71) below, the contact of contact moving plate (11) be arranged on contact still (9) the contact under.

Images