CN209766335U

CN209766335U - Ground fault circuit breaker

Info

Publication number: CN209766335U
Application number: CN201920977012.8U
Authority: CN
Inventors: 陈泽; 陈贵
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-06-26
Filing date: 2019-06-26
Publication date: 2019-12-10
Anticipated expiration: 2029-06-26

Abstract

A ground fault circuit breaker comprises a shell, a reset piece, a reset mechanism, a conductive assembly, a leakage signal detection circuit and an electromagnetic tripping mechanism; the reset mechanism comprises a reset bracket and a bracket reset mechanism, and the reset bracket comprises a reset bracket body and a bracket reset spring; the support return mechanism comprises a return rod, a return spring, a compression spring accommodating cavity, a return sliding block, a contact conductive piece and a spring A; the position A of the reset bracket is in a reset state, the position B of the reset bracket is in a tripping state, and the reset bracket has a tendency of sliding from the position A to the position B under the action of the bracket return mechanism; the contact conductive piece is arranged on the side part of the reset sliding block through a spring A and corresponds to the position of a switch contact of a PCB of the ground fault circuit breaker, and the contact conductive piece is contacted with and separated from the switch contact to realize on-off control of the conductive assembly. The utility model discloses use the contact electrically conductive piece to replace blade switch, improve inner space utilization, reduce the volume, fault circuit breaker compact structure, convenient assembling, stable performance are reliable.

Description

Ground fault circuit breaker

Technical Field

The utility model relates to a ground fault circuit breaker.

Background

the ground Fault Circuit interrupter GFCI (ground Fault Circuit interrupter) is a widely used leakage protection product, and plays a good role in protecting electricity safety.

Chinese patent 201210024531.5, filed by the applicant on 2/4/2012, discloses a receptacle-type ground fault line breaker. As shown in fig. 1 to 3, the ground fault circuit interrupter includes a case (not shown), a reset member 4, a reset mechanism provided in the case, a conductive member from a power supply input side to a load side, a leakage signal detection circuit, and an electromagnetic trip mechanism whose operation is controlled by the leakage signal detection circuit. The reset mechanism comprises a reset bracket and a bracket reset mechanism, wherein the reset bracket comprises a reset bracket frame body and a bracket reset spring 13 arranged in the reset bracket frame body; the support return mechanism comprises a return rod 14, a return spring 17, a compression spring 24, a compression spring accommodating cavity 220 arranged on the support body of the return support and a return slide block 22. The reset bracket has a first position in a reset state and a second position in a tripping state under the action of the reset piece, the bracket return mechanism and the electromagnetic tripping mechanism, and the bracket return mechanism is matched with the reset bracket to ensure that the reset bracket has the tendency of sliding from the first position to the second position.

The reset bracket controls the on-off of a blade switch 18 in the conductive component, thereby controlling the on-off state of the electric connection of the conductive component from the power supply input side to the load side, and the specific working state is as follows: when the reset piece 4 is pressed down, the reset rod 14 moves downwards, and when the reset locking hole 403 which moves to the lower end of the reset rod 14 is concentric with the linkage hole 143 on the reset slider 22, the iron core of the electromagnetic tripping mechanism is inserted into the reset locking hole 403 and the linkage hole 143 under the action of the spring force, and the reset rod 14 is locked. In the locked state, the end of the reset rod 14 passes through the hole on the PCB 61 to push the leaf switch 18 open, so that the leaf switch 18 is separated from the contact on the PCB 61 and the switch is turned off; when the electromagnetic tripping mechanism trips, the iron core of the magnetic tripping mechanism is withdrawn, the reset rod 14 moves upwards under the action of the reset spring 17, the reset slider 22 moves downwards under the action of the compression spring 24, the reset rod 14 is separated from the reset slider 22, the end of the reset rod 14 releases the pressing on the blade switch 18 at the moment, the blade switch 18 is restored to be connected with the contact on the PCB 61 under the action of the spring force, and the switch is conducted.

The above-mentioned existing ground fault circuit interrupter structure has following defect:

firstly, a reset mechanism is adopted to drive a vane switch to control the on-off state of a conductive component, a vane switch with a complex structure is required to be arranged, the number of complex parts of the ground fault circuit breaker is increased, and the manufacturing cost of the ground fault circuit breaker is increased;

Secondly, the side of the PCB where the leaf switch 18 is disposed is inconvenient to dispose other components, resulting in a low space utilization inside the ground fault circuit interrupter and an incompact structure.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in providing a ground fault circuit breaker, overcomes current ground fault circuit breaker and need set up special blade switch, increases ground fault circuit breaker's manufacturing cost's defect.

The utility model provides a technical scheme that its technical problem adopted is: a ground fault circuit breaker is constructed, which comprises a shell, a reset piece, a reset mechanism arranged in the shell, a conductive assembly from a power supply input side to a load side, a leakage signal detection circuit and an electromagnetic tripping mechanism, wherein the action of the electromagnetic tripping mechanism is controlled by the leakage signal detection circuit;

The reset mechanism comprises a reset bracket and a bracket reset mechanism, wherein the reset bracket comprises a reset bracket frame body and a bracket reset spring arranged in the reset bracket frame body; the support return mechanism comprises a return rod, a return spring, a compression spring accommodating cavity and a return sliding block, wherein the compression spring accommodating cavity and the return sliding block are arranged on a return support body; the reset bracket is provided with a position A in a reset state and a position B in a tripping state under the action of the reset piece, the bracket return mechanism and the electromagnetic tripping mechanism, and the bracket return mechanism is matched with the reset bracket to ensure that the reset bracket has the tendency of sliding from the position A to the position B;

the support return mechanism is characterized by comprising a contact conductive piece and a spring A, wherein the contact conductive piece comprises a connecting part and a contact conduction head part, the contact conductive piece is elastically connected to the side part of the return sliding block through the connecting part and the spring A and corresponds to the position of a switch contact arranged on a PCB of the ground fault circuit breaker, and the on-off state of a conductive assembly from the power supply input side to the load side is controlled through the contact and separation of the contact conductive piece and the switch contact.

The utility model discloses an among the ground fault circuit breaker, the contact is electrically conductive connecting portion and is shaft-like structure, this connecting portion suit spring A and with the slider lateral part that resets corresponds the mounting hole and connects, realizes that this contact is electrically conductive and should be connected of slider that resets.

in the ground fault circuit interrupter of the present invention, the ground fault circuit interrupter includes a second PCB disposed on a side of the ground fault circuit interrupter PCB opposite to a side thereof adjacent to the reset mechanism, and spaced from the second PCB; the second PCB board is connected with the PCB board through a row plug-in.

The utility model discloses an among the ground fault circuit breaker, arrange the plug-in components setting and be in on the PCB board, the second PCB board is connected through the peg graft that corresponds the setting above that and this participating in cooperation realization of arranging the plug-in components.

the utility model discloses an among the ground fault circuit breaker, arrange the plug-in components setting and be in on the second PCB board, the PCB board is connected through the peg graft that corresponds the setting above that and this participate in the cooperation realization of arranging the plug-in components.

Implement the utility model discloses a ground fault circuit breaker, with prior art comparison, its beneficial effect is:

1. The contact conductive piece 146 with a simple structure is arranged on the reset sliding block 22 to replace the blade switch 18 with a complex structure, so that a complex structure part of the ground fault circuit interrupter is omitted, the production and the assembly are convenient, and the reliability and the stability of a product can be improved; the contact conductive piece is elastically connected to the reset sliding block through a spring, so that the impact generated when the reset mechanism acts is reduced, and the working reliability is improved;

2. Because the blade switch 18 is omitted, the other side of the PCB 61 originally provided with the blade switch 18 can be provided with a second PCB 62, so that the utilization rate of the internal space of the fault circuit breaker is improved, the volume of the fault circuit breaker is reduced, the structure of the fault circuit breaker is more compact, and the production and assembly are more convenient.

Drawings

Fig. 1 is a front view of a conventional ground fault circuit interrupter with a housing removed.

Fig. 2 is a sectional view taken along a line a-a in fig. 1, showing an internal structure of a conventional ground fault circuit interrupter.

Fig. 3 is an exploded perspective view of a reset mechanism in a conventional ground fault circuit interrupter.

Fig. 4 is a cross-sectional view of an embodiment of the ground fault circuit interrupter internal structure of the present invention corresponding to fig. 2.

Fig. 5 is a cross-sectional view of another embodiment of the ground fault circuit interrupter internal structure of the present invention corresponding to fig. 2.

Fig. 6 is an exploded perspective view of the reset mechanism in the ground fault circuit interrupter of the present invention.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

As shown in fig. 4 and 6, the ground fault circuit interrupter of the present invention includes a housing (not shown in the figure), a reset unit 4, a reset mechanism provided in the housing, a power input side to a load side conductive assembly, a leakage signal detection circuit, and an electromagnetic trip mechanism for controlling the action of the leakage signal detection circuit.

The reset mechanism comprises a reset bracket and a bracket reset mechanism.

The reset cradle includes a reset cradle body 12 and a cradle reset spring 13 disposed in the reset cradle body 12.

The cradle return mechanism includes a reset rod 14, a reset spring 17, a compression spring 24, a compression spring receiving cavity 220 disposed on the reset cradle body 12, a reset slider 22, a contact conductive member 146 and a spring 147, wherein the contact conductive member 146 includes a connecting portion and a contact conductive head portion, the contact conductive member 146 is elastically connected to a side portion of the reset slider 22 through the connecting portion and the spring 147 thereof, and corresponds to positions of switch contacts 611, 612 disposed on a PCB of the ground fault circuit interrupter, and on-off state control of a conductive assembly from a power supply input side to a load side is realized through contact and separation of the contact conductive member 146 and the switch contacts.

In this embodiment, the connecting portion of the contact conductor 146 is configured to be rod-shaped, and the connecting portion is sleeved with the spring 147 and inserted into the corresponding contact conductor mounting hole on the side of the reset slider 22, so as to connect the contact conductor 146 and the reset slider 22; the contact conduction head of contact conductor 146 is formed in a truncated cone shape. In other embodiments, the connecting portion of conductive contact element 146 may have other conventional configurations as desired for the conductive contact element to cooperate with the reset slider structure.

The structure of the reset cradle and cradle return mechanism described above is substantially the same as that of prior application 201210024531.5, except that the length of the reset lever 14 is shortened.

The reset support has a first position in a reset state and a second position in a tripping state under the action of the reset piece, the support return mechanism and the electromagnetic tripping mechanism, and the support return mechanism is matched with the reset support to ensure that the reset support has the tendency of sliding from the first position to the second position.

the action principle of the reset bracket for controlling the on-off state of the conductive component is as follows:

When the reset piece 4 is pressed down, the reset rod 14 moves downwards, and when the reset locking hole 403 which moves to the lower end of the reset rod 14 is concentric with the linkage hole 143 on the reset slider 22, the iron core of the electromagnetic tripping mechanism is inserted into the reset locking hole 403 and the linkage hole 143 under the action of the spring force, so that the reset rod 14 and the reset slider 22 are locked together. In the locked state, the reset slider 22 is lifted by a certain distance due to the action of the reset spring force, and at this time, the contact conductive member 146 on the reset slider 22 is separated from the two contacts 611 and 612 on the PCB 61, so as to disconnect the reverse relay power supply circuit; when the electromagnetic tripping mechanism trips, the iron core of the magnetic tripping mechanism retracts, the reset rod 14 moves upwards under the action of the reset spring 17, the reset slider 22 moves downwards under the action of the compression spring 24, and at the moment, the reset slider 22 returns to enable the contact conductive piece 146 to be in contact conduction with the contacts 611 and 612 on the PCB 61, so that the reverse relay is closed to supply power.

As shown in fig. 5, the ground fault circuit interrupter of the present invention is provided with a second PCB 62, and the second PCB 62 is disposed on the opposite side of the second PCB 61 adjacent to the reset mechanism and spaced from the second PCB 61; the second PCB board 62 is connected to the PCB board 61 by a row plug-in.

The second PCB 62 is connected to the PCB 61 through the row insert 63.

In this embodiment, the row of inserts 63 is disposed on the PCB 61, and the second PCB 62 is connected to the pins of the row of inserts 63 through corresponding insertion holes disposed thereon.

In other embodiments, the row of inserts 63 may be disposed on the second PCB board 62, and the PCB board 61 is connected to the pins of the row of inserts 63 through corresponding insertion holes disposed thereon.

Claims

1. A ground fault circuit breaker comprises a shell, a reset piece, a reset mechanism arranged in the shell, a conductive assembly from a power supply input side to a load side, a leakage signal detection circuit and an electromagnetic tripping mechanism controlled by the leakage signal detection circuit to act;

2. The ground fault circuit interrupter of claim 1, wherein the contact conductive member connecting portion is a rod-shaped structure, and the connecting portion is sleeved on the spring a and connected to the corresponding mounting hole at the side of the reset slider, so that the contact conductive member is connected to the reset slider.

3. The ground fault circuit interrupter of claim 1 or 2, wherein the ground fault circuit interrupter includes a second PCB disposed on a side of the ground fault circuit interrupter PCB opposite a side thereof adjacent the reset mechanism and spaced therefrom; the second PCB board is connected with the PCB board through a row plug-in.

4. The ground fault circuit interrupter of claim 3, wherein said row of inserts is disposed on said PCB, and said second PCB is connected to pins of said row of inserts by mating with corresponding mating holes disposed thereon.

5. The ground fault circuit interrupter of claim 3, wherein said row of inserts is disposed on said second PCB, said PCB being connected by mating pins of said row of inserts with corresponding mating holes disposed thereon.