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CN-224204070-U - Leakage circuit breaker

CN224204070UCN 224204070 UCN224204070 UCN 224204070UCN-224204070-U

Abstract

The application discloses an electric leakage breaker which comprises a breaker shell, wherein an operating mechanism, a circuit board and a test button are arranged in the breaker shell, the circuit board comprises a power taking circuit and a test circuit, the power taking circuit and the test circuit share one static contact piece, one end of a test spring is electrically connected with the circuit board, the other end of the test spring is positioned between the test button and the static contact piece and is normally open with the static contact piece, the test button is driven to enable the test spring to be connected with the static contact piece, the power taking circuit further comprises a movable contact spring, one end of the movable contact spring is electrically connected with the movable contact, the other end of the movable contact spring corresponds to the static contact piece, the movable contact spring is fixed on the movable contact and/or a contact support and moves synchronously along with the contact support, the movable contact is in contact with the static contact piece when the movable contact is in a closed state, the power taking circuit is connected, the movable contact is completely separated from the static contact piece when the movable contact is in an open state, the power taking circuit is disconnected, and the power taking circuit is compact in structure.

Inventors

  • YANG LIN

Assignees

  • 温州科誉电气有限公司

Dates

Publication Date
20260505
Application Date
20250506

Claims (10)

  1. 1. The electric leakage breaker comprises a breaker shell, wherein an operating mechanism, a circuit board and a test button are arranged in the breaker shell, and the electric leakage breaker is characterized in that: The operating mechanism comprises a contact support which is rotatably arranged with the circuit breaker shell and a moving contact which is arranged on the contact support, wherein the moving contact comprises a closed state which is contacted with the fixed contact and an open state which is completely separated from the fixed contact; The circuit board comprises a power taking circuit and a test circuit, and the power taking circuit and the test circuit share one static contact; The test circuit further comprises a test spring, one end of the test spring is electrically connected with the circuit board, the other end of the test spring is positioned between the test button and the static contact and is normally open with the static contact, and the test spring is connected with the static contact under the driving of the test button; The power taking circuit further comprises a movable contact spring, one end of the movable contact spring is electrically connected with the movable contact, the other end of the movable contact spring corresponds to the static contact, the movable contact spring is fixed on the movable contact and/or the contact support and moves synchronously along with the contact support, the movable contact spring contacts with the static contact when the movable contact is in a closed state, the power taking circuit is turned on, and the movable contact spring is completely separated from the static contact when the movable contact is in an open state, so that the power taking circuit is broken.
  2. 2. The leakage breaker of claim 1, wherein the test button is located on one side supported by the contact, the test spring is a torsion spring, the test spring comprises a ring portion, a first extension portion and a second extension portion, the second extension portion is welded with the circuit board to achieve electrical connection of the test spring and the circuit board, the first extension portion bends towards the direction where the test button is located and abuts against the test button, the first extension portion and the static contact are normally open, and the first extension portion is enabled to be in contact with the static contact when the test button is driven.
  3. 3. The residual current circuit breaker according to claim 2, wherein the breaker housing comprises a first chamber and a second chamber, the first chamber and the second chamber are sequentially arranged in the length direction of the breaker housing, the operating mechanism and the test button are arranged in the first chamber, the circuit board is arranged in the second chamber, the breaker housing is provided with a separation protrusion, the separation protrusion is arranged between the first chamber and the second chamber, a first caulking groove is formed in the separation protrusion, the ring part and the first extension part are arranged in the first chamber, the second extension part passes through the separation protrusion through the first caulking groove to be welded with the circuit board, and the size of the first caulking groove is slightly larger than the diameter of the second extension part.
  4. 4. A residual current circuit breaker according to claim 3, wherein the second extension portion is formed by continuously bending to form a protruding portion, and the protruding portion is closer to the opening of the first caulking groove than the welding portion of the second extension portion and the circuit board in the width direction of the circuit breaker case.
  5. 5. A residual current circuit breaker according to claim 3, wherein the first extension portion and the second extension portion extend on both sides of the loop portion in a longitudinal direction of the circuit breaker housing, and the first extension portion extends entirely in a width direction and a height direction of the circuit breaker housing.
  6. 6. The residual current circuit breaker according to claim 2, wherein the static contact comprises a first contact part, a connecting part, a second contact part and a welding part which are sequentially bent and connected, the first contact part is used for being matched with the movable contact spring, the second contact part is used for being matched with the test spring, the welding part is used for being welded with the circuit board to form electric connection, the first contact part is higher than the second contact part in the height direction of the circuit breaker shell, and the first contact part and the second contact part are staggered in the width direction of the circuit breaker shell.
  7. 7. The leakage breaker according to claim 1, wherein one end of the movable contact spring is a fixed end, the other end of the movable contact spring is a movable end, the movable contact and the contact support are fixed by riveting, the fixed end is connected with a riveting position, and the movable end is used for being matched with the static contact.
  8. 8. A leakage breaker according to claim 7 wherein the fixed end is a loop-like structure and is sleeved at the riveting position and fastened during the riveting process.
  9. 9. A residual current circuit breaker according to claim 7 wherein the contact support includes a mounting slot in which the movable contact is located, and a portion of the movable contact spring extends against a slot wall of the mounting slot, the portion being immediately adjacent to the fixed end.
  10. 10. The electric leakage breaker of claim 1, wherein the operating mechanism further comprises a lock catch and a pull rod, an electric leakage release and a bimetallic strip are further arranged in the breaker shell, one end of the pull rod is connected with the lock catch, the other end of the pull rod is connected to an actuating rod of the electric leakage release, the middle part of the pull rod is bent to form a driving part, the driving part is located on a deformation track of the bimetallic strip, the lock catch unlocking is achieved by driving the pull rod when the electric leakage release is actuated, and the driving part is impacted when the bimetallic strip is bent to drive the pull rod to achieve the lock catch unlocking.

Description

Leakage circuit breaker Technical Field The application relates to the field of circuit breakers, in particular to an electric leakage circuit breaker. Background In the field of small-sized leakage circuit breakers, components such as a circuit board, a leakage release and the like are often adopted to form a leakage release system. The circuit board of the conventional leakage circuit breaker is directly electrified from the main circuit where the circuit breaker is located. If a user is installing the miniature leakage breaker, wiring is carried out according to a standard connection method, and then when the breaker breaks, the main contact is disconnected, so that the circuit board can not continuously supply power, and the protective leakage release can not be burnt out because the protective leakage release is in an electrified state for a long time. Some users often reverse the connection of the small-sized residual current circuit breaker, namely commonly known as reverse incoming line. At this time, even if the main contact is opened. The circuit board can continuously supply power, so that the leakage release is electrified for a long time, and finally the leakage release is burnt. Therefore, in order to avoid the situation, the field designs a breaker with an inverted wire feeding function. The circuit board is made into a mechanical switch, the mechanical switch is turned on when the movable contact of the circuit breaker contacts the fixed contact, and the mechanical switch is turned off when the movable contact of the circuit breaker is separated from the fixed contact, so that the reverse wire feeding function is realized, and the electric leakage release is protected. Such as CN 202120384452. X discloses the above structure, but the test button of the above patent is not closely related to the reverse wire function, which is disadvantageous for some specific circuit breakers, such as RCBO circuit breakers. In the case of an RCBO circuit breaker (one of the earth leakage circuit breakers), since all components such as a test mechanism, a circuit board, a zero sequence transformer, an operating mechanism of the circuit breaker, an instantaneous system, a double-gold system, etc. are concentrated in one circuit breaker, the use requirement of an internal space is relatively high. Therefore, how to relate to a more reasonable breaker with the reverse wire feeding function is a considerable problem. Disclosure of Invention In view of the above, the present application aims to overcome the defects in the prior art, and aims to provide an electric leakage breaker. The application provides an electric leakage breaker which comprises a breaker shell, wherein an operating mechanism, a circuit board and a test button are arranged in the breaker shell; The operating mechanism comprises a contact support which is rotatably arranged with the circuit breaker shell and a moving contact which is arranged on the contact support, wherein the moving contact comprises a closed state which is contacted with the fixed contact and an open state which is completely separated from the fixed contact; The circuit board comprises a power taking circuit and a test circuit, and the power taking circuit and the test circuit share one static contact; The test circuit further comprises a test spring, one end of the test spring is electrically connected with the circuit board, the other end of the test spring is positioned between the test button and the static contact and is normally open with the static contact, and the test spring is connected with the static contact under the driving of the test button; The power taking circuit further comprises a movable contact spring, one end of the movable contact spring is electrically connected with the movable contact, the other end of the movable contact spring corresponds to the static contact, the movable contact spring is fixed on the movable contact and/or the contact support and moves synchronously along with the contact support, the movable contact spring contacts with the static contact when the movable contact is in a closed state, the power taking circuit is turned on, and the movable contact spring is completely separated from the static contact when the movable contact is in an open state, so that the power taking circuit is broken. In some embodiments of the application, the test button is positioned on one side supported by the contact, the test spring is a torsion spring, the test spring comprises a ring part, a first extension part and a second extension part, the second extension part is welded with the circuit board to realize the electric connection between the test spring and the circuit board, the first extension part bends towards the direction of the test button and abuts against the test button, the first extension part and the static contact are normally open, and the first extension part is contacted with the static contact under the drive of the test but