Circuit breaker of double-breakpoint test mechanism

Abstract

The utility model relates to the field of switching devices, in particular to a circuit breaker of a double-breakpoint test mechanism, which comprises a shell, a test button and a test torsion spring, a first conductive loop and a second conductive loop are arranged in the shell, and the first conductive loop and the second conductive loop are separated by a middle cover to form two spaces; the first conductive loop comprises a first moving contact; the test torsion spring is clamped in the shell, one of two torsion arms of the test torsion spring abuts against the test button, and the other torsion arm is in a suspended state and is located in the moving stroke of the first moving contact. A static contact tube is arranged on one side of the test button, the circuit breaker of the double-breakpoint test mechanism is provided, the layout structure is optimized, the reasonability of product distribution is ensured, and the stability of products is improved; the test button is additionally arranged, the middle cover is arranged to separate the two circuits, and the two circuits are arranged in the two spaces, so that arc isolation is realized.

Description

Technical Field

[0001] The utility model relates to the field of switch electrical appliances, in particular to a circuit breaker with a double breakpoint testing mechanism. Background Art

[0002] Traditional circuit breakers are divided into the following types: fork-shaped double-breakpoint circuit breakers, in which two breakpoints are arranged in parallel in two parallel spaces with the same opening direction. This method has densely distributed contacts, concentrated temperature, easy to generate heat, high temperature rise, and high safety hazards; wing-shaped double-breakpoint circuit breakers, in which the same moving contact conductor is used to connect with two static contacts through rotation. This method has poor arc isolation effect between the two breakpoints and is easy to break through and cause short circuit; bridge-shaped double-breakpoint circuit breakers, in which the same moving contact conductor is used to connect with two static contacts through equal movement. This method has a slow opening speed and has a greater impact on the breaking effect. Existing double-breakpoint test mechanisms mostly use the method of adding additional conductive components to add a breakpoint, which not only increases the cost and increases the assembly steps of the product, but also is not convenient for the structural upgrade of the existing single-breakpoint test mechanism. In addition, due to the complex and scattered layout, the product volume is too large. Utility Model Content

[0003] In order to solve the problems mentioned in the above background technology, a circuit breaker with a double breakpoint testing mechanism is proposed, which optimizes the layout structure, ensures the rationality of product distribution, and improves the stability of the product; a new test button is added, and the two lines are separated by setting a middle cover, and the two lines are set in two spaces to achieve arc isolation.

[0004] The technical solution of the utility model: a circuit breaker with a double breakpoint testing mechanism, comprising a shell, a test button and a test torsion spring, wherein a first conductive circuit and a second conductive circuit are arranged in the shell, and the first conductive circuit and the second conductive circuit are separated by a middle cover to form two spaces; the first conductive circuit comprises a first moving contact; the test torsion spring is clamped in the shell, one of the two torsion arms of the test torsion spring is in contact with the test button, and the other torsion arm is in a suspended state and is located within the movable stroke of the first moving contact; a static contact tube is arranged on one side of the test button.

[0005] Preferably, the shell is also provided with a handle, the handle is connected to the lever through a pull rod, and the two sides of the lever are respectively connected to the first conductive circuit and the second conductive circuit; the first conductive circuit includes a first torsion spring, and the second conductive circuit includes a second torsion spring and a second moving contact.

[0006] Preferably, when the circuit breaker is closed, the handle drives the rotational connection position of the first torsion spring and the second torsion spring to cause the lever, the first moving contact and the second moving contact to rotate simultaneously, the first moving contact and the second moving contact are respectively in contact with the corresponding static contacts, the first conductive circuit and the second conductive circuit are in an energized state, at which time the test torsion spring abuts against the first moving contact, and after pressing the test button, the test button contacts the static contact tube, and at this time the test button is in a conductive state.

[0007] Preferably, the shell comprises an upper cover and a lower cover, a snap fastener is provided between the upper cover and the lower cover, and the upper cover and the lower cover are fixedly connected by the snap fastener.

[0008] Preferably, a first terminal assembly is further provided in the shell, and the first terminal assembly includes a first terminal board, and the first terminal board is an integrated structure.

[0009] Preferably, a double metal piece is provided in the shell, and the double metal piece is connected with a first wire and a second wire, the first wire is connected to the first moving contact, and the second wire is connected to the terminal block.

[0010] Preferably, a second terminal assembly and a coil assembly are also provided in the shell, the second terminal assembly is located on one side of the test torsion spring, the second terminal assembly includes a second terminal board, a third wire is connected to the second terminal board, and the other end of the third wire is connected to the coil assembly.

[0011] Preferably, an arc extinguishing hood is provided on one side of the coil assembly, and the arc extinguishing hood is located on one side of the first conductive loop and the second conductive loop.

[0012] Compared with the prior art, the utility model provides a circuit breaker with a double breakpoint test mechanism, which has the beneficial effects of optimizing the layout structure, ensuring the rationality of product distribution, and improving product stability; adding a test button, and separating the two circuits by setting a middle cover, setting the two circuits in two spaces, and realizing arc isolation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0014] Figure 1 It is a schematic diagram of an embodiment of the utility model.

[0015] Figure 2 This is a schematic diagram of an embodiment of the utility model without an upper cover.

[0016] Figure 3 for Figure 2 A-direction cross-sectional view.

[0017] Reference numerals

[0018] 1-housing; 11-first conductive circuit; 111-first moving contact; 112-first torsion spring; 12-second conductive circuit; 121-second torsion spring; 122-second moving contact; 13-middle cover; 14-static contact; 15-upper cover; 16-lower cover; 17-fastener; 2-test button; 21-static contact tube; 3-test torsion spring; 4-handle; 41-pull rod; 5-lever; 6-first terminal assembly; 61-first terminal board; 7-double metal fittings; 71-first wire; 72-second wire; 8-second terminal assembly; 81-second terminal board; 82-third wire; 9-coil assembly; 10-arc extinguishing cover; DETAILED DESCRIPTION

[0019] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments.

[0020] The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0021] Based on the embodiments of the present utility model, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present utility model.

[0022] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0023] It should be noted that the terms "include", "comprises" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0024] like Figures 1 to 3 As shown, it includes a shell 1, a test button 2 and a test torsion spring 3, wherein a first conductive circuit 11 and a second conductive circuit 12 are arranged in the shell 1, and the first conductive circuit 11 and the second conductive circuit 12 are separated by a middle cover 13 to form two spaces; the first conductive circuit 11 includes a first moving contact 111; the test torsion spring 3 is clamped in the shell 1, and one of the two torsion arms of the test torsion spring 3 abuts against the test button 2, and the other torsion arm is in a suspended state and is located within the movable stroke of the first moving contact 111; a static contact tube 21 is arranged on one side of the test button 2; the shell 1 is also provided with a handle 4, and the handle 4 is connected to a lever 5 through a pull rod 41, and the two sides of the lever 5 are respectively connected to the first conductive circuit 11 and the second conductive circuit 12; the first conductive circuit 11 includes a first torsion spring 112, and the second conductive circuit 12 includes a second torsion spring 121 and a second moving contact 122.

[0025] When the circuit breaker is closed, the handle 4 drives the first torsion spring 112 and the second torsion spring 121 to rotate and connect, so that the lever 5, the first moving contact 111 and the second moving contact 122 rotate simultaneously, the first moving contact 111 and the second moving contact 122 are in contact with the corresponding static contact 14 respectively, the first conductive circuit 11 and the second conductive circuit 12 are in a powered state, at this time, the test torsion spring 3 abuts against the first moving contact 111, after pressing the test button 2, the test button 2 is in contact with the static contact tube 21, at this time, the test button 2 is in a conductive state; a new test button is added, and the two circuits are separated by setting a middle cover, and the two circuits are set in two spaces, so as to achieve arc isolation; the housing 1 includes an upper cover 15 and a lower cover 16, and a snap fastener 17 is provided between the upper cover 15 and the lower cover 16, and the upper cover 15 and the lower cover 16 are fixedly connected by the snap fastener 17; a first terminal assembly 6 is also provided in the housing 1, and the first terminal assembly 6 includes a first terminal The first terminal block 61 is an integrated structure; a double metal piece 7 is provided in the shell 1, and the double metal piece 7 is connected with a first wire 71 and a second wire 72, the first wire 71 is connected to the first moving contact 111, and the second wire 72 is connected to the first terminal block 61; a second terminal assembly 8 and a coil assembly 9 are also provided in the shell 1, the second terminal assembly 8 is located on one side of the test torsion spring 3, the second terminal assembly 8 includes a second terminal block 81, and the second terminal block 81 is connected with a third wire 82, and the other end of the third wire 82 is connected to the coil assembly 9; an arc extinguishing cover 10 is provided on one side of the coil assembly 9, and the arc extinguishing cover 10 is located on one side of the first conductive loop 11 and the second conductive loop 12; the first conductive loop 11, the second conductive loop 12, the coil assembly 9 and the arc extinguishing cover 10 are reasonably arranged, the layout structure inside the shell 1 is optimized, the rationality of the product distribution is ensured, and the stability of the product is improved.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A circuit breaker with a double breakpoint test mechanism, comprising a housing, a test button and a test torsion spring, characterized in that: A first conductive circuit and a second conductive circuit are provided in the shell, and the first conductive circuit and the second conductive circuit are separated by a middle cover to form two spaces; the first conductive circuit includes a first moving contact; the test torsion spring is clamped in the shell, and one of the two torsion arms of the test torsion spring abuts against the test button, and the other torsion arm is in a suspended state and is located within the movable stroke of the first moving contact; a static contact tube is provided on one side of the test button.

2. The circuit breaker with a double breakpoint test mechanism as claimed in claim 1, characterized in that: The housing is also provided with a handle, which is connected to the lever through a pull rod, and the two sides of the lever are respectively connected to the first conductive circuit and the second conductive circuit; the first conductive circuit includes a first torsion spring, and the second conductive circuit includes a second torsion spring and a second moving contact.

3. The circuit breaker with a double breakpoint test mechanism as claimed in claim 2, characterized in that: When the circuit breaker is closed, the handle drives the rotation connection position of the first torsion spring and the second torsion spring to cause the lever, the first moving contact and the second moving contact to rotate simultaneously, the first moving contact and the second moving contact are respectively in contact with the corresponding static contacts, the first conductive circuit and the second conductive circuit are in an energized state, at this time the test torsion spring abuts against the first moving contact, after pressing the test button, the test button contacts the static contact tube, and at this time the test button is in a conductive state.

4. The circuit breaker with a double breakpoint test mechanism as claimed in claim 1, characterized in that: The shell comprises an upper cover and a lower cover, wherein a snap fastener is arranged between the upper cover and the lower cover, and the upper cover and the lower cover are fixedly connected by the snap fastener.

5. The circuit breaker with a double breakpoint test mechanism as claimed in claim 1, characterized in that: A first terminal assembly is also disposed in the housing. The first terminal assembly includes a first terminal board. The first terminal board is an integrated structure.

6. The circuit breaker with a double breakpoint test mechanism as claimed in claim 5, characterized in that: A double metal piece is provided in the shell, and the double metal piece is connected with a first wire and a second wire, the first wire is connected to the first moving contact, and the second wire is connected to the wiring board.

7. The circuit breaker with a double breakpoint test mechanism as claimed in claim 1, characterized in that: A second terminal assembly and a coil assembly are also provided in the shell. The second terminal assembly is located on one side of the test torsion spring. The second terminal assembly includes a second terminal board. A third wire is connected to the second terminal board. The other end of the third wire is connected to the coil assembly.

8. The circuit breaker with a double breakpoint test mechanism as claimed in claim 7, characterized in that: An arc extinguishing cover is provided on one side of the coil assembly, and the arc extinguishing cover is located on one side of the first conductive loop and the second conductive loop.

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