A wiring structure of a leakage circuit breaker based on chip contact

Abstract

A wiring structure for a residual current circuit breaker (RCCB) based on sheet contact is disclosed. This primarily addresses the short lifespan of current RCCBs' power supply structures. The structure includes: a protrusion (21) on the circumferential outer wall of the handle; a stationary contact piece (61) correspondingly located below the handle, electrically connected to the circuit board; and a resilient moving contact piece (62) opposite to the moving contact piece. When the handle is in the closed position, the protrusion pushes the moving contact piece into contact with the stationary contact piece, electrically connecting the moving contact piece to the coil. When the handle is in the open position, the moving contact piece separates from the stationary contact piece due to its elasticity. This invention provides a wiring structure for an RCCB based on sheet contact, where the protrusion on the handle drives the sheet contact structure, resulting in a longer service life.

Description

Technical Field

[0001] This utility model relates to the field of protective switches, specifically to a wiring structure for a residual current circuit breaker based on a chip contact. Background Technology

[0002] A circuit breaker is a switching device that can close, carry, and interrupt current under normal circuit conditions, and can close, carry, and interrupt current under abnormal circuit conditions within a specified time.

[0003] The existing residual current circuit breaker (RCCB) structure generally draws power from the circuit board and the testing device at the top or bottom of the RCCB. The side of the circuit board that draws power is the load side, and the side that does not draw power is the incoming line side. If the connection is reversed, the circuit board's power-drawing end becomes the power supply side. Even if the moving contact disconnects the circuit, the circuit board remains energized. If the circuit board is constantly energized, it will quickly burn out the trip coil and the circuit board, leading to damage to the entire circuit breaker.

[0004] To address this, Chinese Patent No. CN114256033A discloses a method for disconnecting power supply when a circuit breaker trips. This method uses a torsion spring on a handle for operation. However, because the torsion spring is relatively thin, sparking may occur during disconnection, causing the torsion spring to turn black or even be damaged, thus affecting its service life. Utility Model Content

[0005] To overcome the shortcomings of the prior art, this utility model provides a wiring structure for a residual current circuit breaker based on a sheet contact, which mainly solves the problem of the short service life of the current residual current circuit breaker's power supply structure.

[0006] The technical solution of this utility model is as follows: A wiring structure for a residual current circuit breaker based on a chip contact includes a housing, within which a coil, a circuit board, and a rotatable handle are housed. A protrusion is provided on the circumferential outer wall of the handle; A stationary contact piece is disposed below the handle, and the stationary contact piece is electrically connected to the circuit board; A flexible movable contact is disposed opposite to the stationary contact and electrically connected to the coil. When the handle is in the closed position, the protrusion pushes the movable contact to contact the stationary contact. When the handle is in the open position, the moving contact separates from the stationary contact due to its own elastic force.

[0007] A stationary boss is integrally provided on the stationary contact piece, and a movable boss is integrally provided on the movable contact piece. The stationary boss and the movable boss are arranged opposite to each other.

[0008] The inner wall of the housing is provided with a mounting wall, and the mounting wall is provided with a slot, and part of the stationary contact piece is disposed in the slot.

[0009] The card slot is provided with several protrusions for fixing the card slot.

[0010] The housing is equipped with a movable test button, and an elastic element is installed at the bottom of the test button.

[0011] The elastic element is a torsion spring, which is electrically connected to the circuit board. One pin of the torsion spring is used to elastically support the test button. When the test button is pressed, the pin of the torsion spring contacts the stationary contact piece.

[0012] The housing also includes a mounting block and a stop block. The movable contact piece includes an integrally formed base plate and an inclined plate. The base plate is disposed on the mounting block, the inclined plate is provided with the movable boss, and the stop block is disposed opposite to the rear of the inclined plate.

[0013] The beneficial effects of this utility model are: This utility model provides a wiring structure for a residual current circuit breaker based on sheet contact, which drives the sheet contact structure through the boss on the handle, resulting in a longer service life. Attached Figure Description

[0014] Figure 1 This is an internal schematic diagram of one embodiment of the present invention.

[0015] Figure 2 for Figure 1 Enlarged diagram of point A in the middle.

[0016] Figure 3 This is a partial perspective view of one embodiment of the present invention. Figure 1 .

[0017] Figure 4 This is a partial perspective view of one embodiment of the present invention. Figure 2 .

[0018] Figure 5 This is a partial perspective view of one embodiment of the present invention. Figure 3 . Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings. A wiring structure for a residual current circuit breaker based on a piece contact includes a housing 1, in which a coil 4, a circuit board 3, and a rotatable handle 2 are provided. The housing also includes a protrusion 21 disposed on the circumferential outer wall of the handle; and a stationary contact piece 61 disposed below the handle, which is electrically connected to the circuit board. A flexible movable contact 62 is disposed opposite to the stationary contact and electrically connected to the coil. When the handle is in the closed position, the protrusion pushes the movable contact to contact the stationary contact; when the handle is in the open position, the movable contact separates from the stationary contact due to its own elastic force.

[0020] The housing also includes a conventional residual current circuit breaker tripping mechanism, which is existing technology and will not be described in detail. When the handle is in the closed position, the protrusion on the handle pushes the moving contact against the stationary contact, allowing power to be drawn. When the handle is in the open position, the moving contact's elasticity facilitates separation from the stationary contact, preventing power from reaching the circuit board. This disconnection is achieved through the plate-like moving and stationary contacts, increasing service life. The stationary contact can be connected to the circuit board via a wire, and the moving contact is electrically connected to the coil via a wire.

[0021] In this embodiment, as shown in the figure, a stationary boss 611 is integrally provided on the stationary contact piece, and a movable boss 621 is integrally provided on the movable contact piece. The stationary boss and the movable boss are arranged opposite to each other. This assembly can be formed by stamping, which facilitates better contact.

[0022] In this embodiment, as shown in the figure, the inner wall of the housing is provided with a mounting wall 11, and the mounting wall is provided with a slot 111, in which part of the stationary contact piece is disposed. Installation is relatively convenient.

[0023] In this embodiment, as shown in the figure, the slot is provided with several protrusions 112 for fixing the slot. This makes the installation more stable.

[0024] In this embodiment, as shown in the figure, the housing is provided with a movable test button 7, and an elastic element 71 is installed at the bottom of the test button.

[0025] In this embodiment, as shown in the figure, the elastic element is a torsion spring, which is electrically connected to the circuit board. One pin of the torsion spring is used to elastically support the test button. When the test button is pressed, the pin of the torsion spring contacts the stationary contact piece. Simultaneously, the stationary contact piece can also be used for the test button.

[0026] In this embodiment, as shown in the figure, the housing also includes a mounting block 12 and a stop block 13. The movable contact piece includes an integrally formed base plate 622 and an inclined plate 623. The base plate is disposed on the mounting block, and the inclined plate has the movable boss. The stop block is disposed opposite to the rear of the inclined plate. This structure is simple for mounting the movable contact piece and also includes a middle stop block 14, which is disposed opposite to the mounting block on both sides of the movable contact piece to limit its movement.

[0027] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] The embodiments described with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. The embodiments should not be considered as limitations on the present invention, but any improvements made based on the spirit of the present invention should be within the protection scope of the present invention.

Claims

1. A wiring structure for a residual current circuit breaker based on a chip contact, comprising a housing (1), wherein a coil (4), a circuit board (3), and a rotatable handle (2) are disposed within the housing, characterized in that: Also includes A protrusion (21) is provided on the circumferential outer wall of the handle; A stationary contact piece (61) is disposed below the handle, and the stationary contact piece is electrically connected to the circuit board; A flexible movable contact piece (62) is disposed opposite to the stationary contact piece and electrically connected to the coil. When the handle is in the closed position, the protrusion pushes the movable contact piece to contact the stationary contact piece. When the handle is in the open position, the moving contact separates from the stationary contact due to its own elastic force.

2. The wiring structure of a residual current circuit breaker based on a chip contact according to claim 1, characterized in that: A stationary boss (611) is integrally provided on the stationary contact piece, and a movable boss (621) is integrally provided on the movable contact piece. The stationary boss and the movable boss are arranged opposite to each other.

3. The wiring structure of a residual current circuit breaker based on a chip contact according to claim 1, characterized in that: The inner wall of the housing is provided with a mounting wall (11), and the mounting wall is provided with a slot (111), and part of the static contact piece is provided in the slot.

4. The wiring structure of a residual current circuit breaker based on a chip contact according to claim 3, characterized in that: The card slot is provided with a number of protrusions (112) for fixing the card slot.

5. The wiring structure of a residual current circuit breaker based on a chip contact according to claim 2, characterized in that: The housing is provided with a movable test button (7), and an elastic element (71) is installed at the bottom of the test button.

6. The wiring structure of a residual current circuit breaker based on a chip contact according to claim 5, characterized in that: The elastic element is a torsion spring, which is electrically connected to the circuit board. One pin of the torsion spring is used to elastically support the test button. When the test button is pressed, the pin of the torsion spring contacts the stationary contact piece.

7. The wiring structure of a residual current circuit breaker based on a chip contact according to claim 6, characterized in that: The housing is also provided with a mounting block (12) and a stop block (13). The movable contact piece includes an integrally formed base plate (622) and a slanted plate (623). The base plate is provided on the mounting block, the slanted plate is provided with the movable boss, and the stop block is located opposite to the rear of the slanted plate.

Images