CN222838680U - Transformer mechanism and circuit breaker - Google Patents

Abstract

The utility model relates to a mutual inductor mechanism and a circuit breaker, comprising: a bracket, a mounting groove is formed at one end in a first direction; a current mutual inductor is installed in the mounting groove; a first circuit board, comprising a circuit board body, the circuit board body is installed at one end of the bracket away from the mounting groove in the first direction, and the current mutual inductor is electrically connected to a control module through the circuit board body; both ends of the bracket in the second direction are provided with plug-in grooves, and the plug-in grooves extend along the first direction; the first circuit board also comprises two first terminals respectively connected to the two ends of the circuit board body in the second direction, the two first terminals both extend away from the circuit board body in the first direction and are respectively plugged into the two plug-in grooves; wherein the first direction intersects with the second direction.

Description

Mutual inductor mechanism and circuit breaker

Technical Field

The utility model relates to the technical field of circuit breakers, in particular to a transformer mechanism and a circuit breaker.

Background

A circuit breaker refers to a switching device capable of closing, carrying and opening a current under normal circuit conditions and capable of closing, carrying and opening a current under abnormal circuit conditions within a prescribed time. The circuit breaker is provided with a current transformer, and the current transformer converts primary side large current into secondary side small current for measurement according to an electromagnetic induction principle.

In a conventional circuit breaker, a current transformer is often directly electrically connected with a control module through a wire to transmit data to the control module, so that not only is the installation time consuming, but also the circuit breaker is internally disordered when the wire is fully distributed due to the limited space in the circuit breaker. Some manufacturers also adopt a circuit board to realize the electric connection of the current transformer and the control module, but each structure is assembled and dispersed, and the occupied space is larger.

Disclosure of utility model

In view of the above, it is necessary to provide a transformer mechanism and a circuit breaker, in which the transformer mechanism is electrically connected to a control module through a circuit board, each structure is assembled compactly, and the space occupied by the circuit breaker using the transformer mechanism is small.

A transformer mechanism comprising:

a bracket having an installation groove formed at one end in a first direction;

the current transformer is arranged in the mounting groove;

The first circuit board comprises a circuit board main body, the circuit board main body is arranged at one end of the bracket, which is far away from the mounting groove in the first direction, and the current transformer is electrically connected with the control module through the circuit board main body;

The first circuit board further comprises two first terminals which are respectively connected to the two ends of the circuit board main body in the second direction, wherein the two first terminals are respectively extended away from the circuit board main body in the first direction and are respectively inserted into the two inserting grooves;

wherein the first direction intersects the second direction.

In one embodiment, one of the two first terminals is used for transmitting a power signal and the other is used for transmitting a data signal.

In one embodiment, the transformer mechanism further includes a second circuit board, the second circuit board is disposed at one end of the bracket with the mounting groove in the first direction, and two second terminals disposed at intervals in the second direction are disposed at one side of the second circuit board facing the first circuit board;

The two first terminals and the two second terminals are electrically connected in a one-to-one correspondence.

In one embodiment, the bracket has at least two of the mounting slots, the mounting slots being arranged along the second direction;

The number of the current transformers is at least two and is arranged in the mounting groove in a one-to-one correspondence manner, and/or

The current transformer comprises a current transformer for metering and a current transformer for protection.

In one embodiment, the mutual inductor mechanism further comprises a wiring piece, wherein the wiring piece extends along a third direction and is inserted into the current mutual inductor in a penetrating way;

The bracket has a transformer isolation plate which abuts against a surface of the wiring member facing the wiring board main body for isolating an arc.

In one embodiment, the bracket comprises a bracket main body and two plug-in parts, wherein the two plug-in parts are distributed at intervals along the second direction, one end of each plug-in part is connected with the bracket main body, and the other end of each plug-in part extends away from the bracket main body along a third direction;

The mounting grooves are formed in the support main body, each plug-in connection portion is provided with one plug-in connection groove, the first circuit board is matched with the support in shape, the circuit board main body is attached to the support main body, and the first terminals are plugged in the plug-in connection grooves of the plug-in connection portions.

In one embodiment, the circuit board main body has two third terminals arranged at intervals on one side facing away from the bracket in the first direction, and the two third terminals are used for being electrically connected with the control module;

One of the two third terminals is used for transmitting a power supply signal, and the other is used for transmitting a data signal.

In one embodiment, the circuit board main body includes a first sub-board and a second sub-board that are separately arranged, the first sub-board is attached to the bracket, two first terminals are respectively connected with two ends of the first sub-board along the second direction, and the second sub-board is arranged at one side of the first sub-board away from the bracket;

the two third terminals are arranged on one side of the second sub-board, which is opposite to the first sub-board.

In one embodiment, two fourth terminals and fifth terminals are respectively disposed on one side of the first sub-board and one side of the second sub-board, which face each other, and the fourth terminals and the fifth terminals are electrically connected in a one-to-one correspondence manner, wherein one of the fourth terminals and the fifth terminals is used for transmitting power signals, and the other of the fourth terminals and the fifth terminals is used for transmitting data signals.

In one embodiment, a limiting column is convexly arranged on the bracket along the first direction, and the limiting column penetrates through the first sub-board and the second sub-board;

The mutual inductor mechanism further comprises a fixing piece, wherein the fixing piece penetrates through the support to fixedly connect the first daughter board with the support, and the fixing piece penetrates through the limit column to fixedly connect the second daughter board with the limit column.

A circuit breaker comprises the transformer mechanism.

Above-mentioned mutual-inductor mechanism and circuit breaker, current transformer pass through first circuit board and control module electricity is connected, avoids directly realizing the electric connection of current transformer and control module through the wire, and structural installation labour saving and time saving, and owing to reduced the setting of wire in the circuit breaker for the circuit breaker is inside regular. Simultaneously, when installing, only need install current transformer in the mounting groove of support, install first circuit board to the support deviate from one side in the mounting groove and make its first terminal peg graft in the jack-in groove in first direction can, it is convenient to install, current transformer and first circuit board all concentrate the installation on the support, occupation space is little, and then has reduced the volume of circuit breaker.

Drawings

FIG. 1 is a block diagram of a transformer mechanism according to an embodiment of the present application;

FIG. 2 is a block diagram of a bracket of the transformer mechanism shown in FIG. 1;

FIG. 3 is an exploded view of the transformer mechanism shown in FIG. 1;

Fig. 4 is a block diagram of a transformer mechanism according to another embodiment of the present application (a first circuit board of the transformer mechanism in fig. 4 is electrically connected to a control module);

FIG. 5 is a block diagram of another view of the transformer mechanism shown in FIG. 4;

Fig. 6 is another exploded view of the transformer mechanism shown in fig. 1.

Reference numerals illustrate:

100. A transformer mechanism; 10, a bracket, 11, a mounting groove, 12, a plugging groove, 13, a bracket main body, 14, a plugging part, 15, a mutual inductor isolation plate, 20, a current transformer, 21, a current transformer for metering, 22, a current transformer for protection, 30, a first circuit board, 31, a circuit board main body, 32, a first terminal, 33, a third terminal, 34, a first sub-board, 35, a second sub-board, 36, a fourth terminal, 37, a fifth terminal, 40, a second circuit board, 41, a second terminal, 42, a conductive hole, 50, a temperature sensor, 60, a wiring piece, 70, a limit post, 200 and a control module.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected through an intervening medium, or in communication between two elements or in an interaction relationship between two elements, unless otherwise explicitly specified. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Referring to fig. 1, one embodiment of the present application provides a circuit breaker including a transformer mechanism 100. The transformer mechanism 100 includes a bracket 10, a current transformer 20, and a first circuit board 30.

Referring to fig. 1 and 2, a mounting groove 11 is formed at one end of a bracket 10 in a first direction, and a current transformer 20 is mounted in the mounting groove 11. Referring to fig. 3, the first circuit board 30 includes a circuit board main body 31, where the circuit board main body 31 is mounted on an end of the bracket 10 facing away from the mounting groove 11 in the first direction, and specifically, the circuit board main body 31 is attached to an end surface of the bracket 10 at an end where the mounting groove 11 is not provided in the first direction. The bracket 10 has insertion grooves 12 at both ends in the second direction, and both insertion grooves 12 extend in the first direction. The first circuit board 30 further includes two first terminals 32 respectively connected to two ends of the circuit board main body 31 in the second direction, and the two first terminals 32 extend away from the circuit board main body 31 along the first direction and are respectively inserted into the two inserting grooves 12.

The first direction intersects the second direction. Specifically, the first direction is perpendicular to the second direction. In fig. 1, the Z direction is a first direction, and the Y direction is a second direction. In some embodiments, the circuit breaker is a cuboid or cuboid-like structure, the first direction is a height direction of the circuit breaker, and the second direction is a width direction of the circuit breaker. It will be appreciated that in other embodiments, the specific shape of the circuit breaker is not limited, and the first direction and the second direction are not limited.

Further, referring to fig. 4, the circuit breaker further includes a control module 200, and the current transformer 20 is electrically connected to the control module 200 through a circuit board body 31. One of the two first terminals 32 is used for transmitting a power signal, and the other is used for transmitting a data signal. Since the first circuit board 30 is electrically connected with the control module 200 through the circuit board body 31, one of the first terminals 32 can transmit a power signal to the control module 200 through the circuit board body 31, so that the control module 200 is powered on, and the other first terminal 32 can transmit an external data signal to the control module 200 through the circuit board body 31, and the control module 200 controls the data signal. Since the current transformer 20 is electrically connected with the control module 200 through the circuit board body 31, data signals of the current transformer are also transmitted to the control module 200 through the circuit board body 31. Optionally, the data signal includes a temperature signal, a current signal, and the like.

In other embodiments, the type of signal transmitted by the first terminal 32 is not limited.

According to the transformer mechanism 100, the current transformer 20 is electrically connected with the control module 200 through the first circuit board 30, so that the current transformer 20 is prevented from being electrically connected with the control module 200 directly through wires, time and labor are saved in structural installation, and the arrangement of wires in the circuit breaker is reduced, so that the circuit breaker is regular. Meanwhile, in the transformer mechanism 100 of the present application, when the installation is performed, only the current transformer 20 is required to be installed in the installation groove 11 of the bracket 10, the first circuit board 30 is installed on one side of the bracket 10, which is away from the installation groove 11 in the first direction, and the first terminal 32 of the first circuit board is inserted into the insertion groove 12, so that the installation is convenient, the current transformer 20 and the first circuit board 30 are both installed on the bracket 10 in a concentrated manner, that is, the bracket 10 integrates the collection and the transmission of the large current, the occupied space is small, and the volume of the circuit breaker is further reduced.

Optionally, with continued reference to fig. 2, the bracket 10 includes a bracket body 13 and two plugging portions 14. The two plugging portions 14 are arranged at intervals along the second direction, one end of each plugging portion 14 is connected with the bracket main body 13, and the other end extends away from the bracket main body 13 along the third direction. The first direction, the second direction and the third direction are intersected in pairs. Specifically, the first direction, the second direction and the third direction are perpendicular to each other. Referring to fig. 1, the X direction in fig. 1 is a third direction. When the circuit breaker is of a cuboid structure, the third direction is the length direction of the circuit breaker. The mounting groove 11 is arranged on the bracket main body 13, each plug-in part 14 is provided with a plug-in groove 12, and the first circuit board 30 is matched with the shape of the bracket 10, so that the circuit board main body 31 is attached to the bracket main body 13, and the first terminal 32 is plugged in the plug-in groove 12 of the plug-in part 14.

Because one end of the plugging portion 14 is connected to the bracket main body 13, the other end extends away from the bracket main body 13 along the third direction, and the first circuit board 30 is adapted to the bracket 10 in a profiling manner, so that after the first terminal 32 is inserted into the plugging slot 12, the first terminal 32 is misplaced with the current transformer 20 in the first direction, so that the first terminal 32 is connected to other structures (such as the second circuit board 40 (described below)).

It will be appreciated that in other embodiments, the bracket 10 may be provided in other manners, as long as the installation manner for installing the current transformer 20 and the first circuit board 30 is realized.

In some embodiments, referring to fig. 4 and 5, the transformer mechanism 100 further includes a second circuit board 40, where the second circuit board 40 is disposed at an end of the bracket 10 having the mounting slot 11 in the first direction, and a side of the second circuit board 40 facing the first circuit board 30 has two second terminals 41. Wherein, two second terminals 41 are spaced in the second direction, and two second terminals 41 are in one-to-one corresponding plug-in fit with two first terminals 32 to realize electric connection. In this way, the two second terminals 41 can respectively transmit the power signal and the data signal to the two first terminals 32, and the two first terminals 32 transmit the power signal and the data signal to the control module 200 through the circuit board body 31.

Optionally, with continued reference to fig. 4, the second circuit board 40 is provided with a conductive hole 42, and a conductive post is disposed in the conductive hole 42, where the conductive post can be electrically connected with a static contact of the circuit breaker to obtain electricity from the static contact. When the second circuit board 40 is powered, one of the second terminals 41 is capable of transmitting a power signal to the first terminal 32. Further, the second circuit board 40 is further provided with a temperature sensor 50, and the temperature sensor 50 is used for detecting the temperatures of the fixed contact and the moving contact. After the temperature sensor 50 detects the temperature of the contact, the other second terminal 41 can transmit a temperature signal to the other first terminal 32. Since the second circuit board 40 can take electricity through the conductive posts and detect temperature through the temperature sensor 50, it can be seen that the second circuit board 40 integrates the temperature detection and electricity taking functions.

In some embodiments, with continued reference to fig. 2, the bracket body 13 has at least two mounting slots 11 thereon, and the mounting slots 11 are sequentially arranged along the second direction. The number of the current transformers 20 is at least two, and are installed in the installation groove 11 in a one-to-one correspondence. In this way, the plurality of current transformers 20 cooperate with each other to detect the current in the circuit breaker, and the respective current transformers 20 are mounted in the mounting grooves 11 with respect to each other without affecting each other.

With continued reference to fig. 5, each current transformer 20 includes a metering current transformer 21 and a protection current transformer 22. The metering current transformer 21 provides current information of the power grid to the control module 200 in a normal working current range, and the protection current transformer 22 provides power grid fault current information of the power grid to the control module 200 in a power grid fault state.

The measuring current transformer 21 and the protecting current transformer 22 are connected to the circuit board main body 31 by leads. In some embodiments, the metering current transformer 21 and the protection current transformer 22 may be electrically connected to the circuit board body 31 by a flexible wire or by a direct contact hard connection.

Further, the transformer mechanism 100 further includes a wire connector 60, and the wire connector 60 extends along the third direction and is inserted into the current transformer 20. The holder body 13 has a transformer isolation plate 15, and the transformer isolation plate 15 abuts against a surface of the wiring member 60 facing the wiring board body 31 for isolating an arc. By providing the wiring member 60, the circuit breaker can be connected to an external power source, and at the same time, the wiring member 60 can be fitted with the transformer isolation plate 15 to isolate an arc in the circuit breaker.

In some embodiments, referring to fig. 6, the circuit board main body 31 has two third terminals 33 disposed at intervals on a side facing away from the bracket 10 in the first direction, and the two third terminals 33 are used for plugging with the control module 200 to achieve electrical connection. One of the two third terminals 33 is used for transmitting a power signal, and the other is used for transmitting a data signal. Thus, after the first circuit board 30 gets electricity, the power signal is transmitted to the control module 200 through one second terminal 41, one first terminal 32, the circuit board main body 31 and one third terminal 33, so that the control module 200 gets electricity, and the data signal is transmitted to the control module 200 through the other second terminal 41, the other first terminal 32, the circuit board main body 31 and the other third terminal 33, so that the control module 200 obtains the data signal.

With continued reference to fig. 6, the circuit board main body 31 includes a first sub-board 34 and a second sub-board 35 that are separately disposed. The first sub-board 34 is attached to the bracket 10, two first terminals 32 are respectively connected to two ends of the first sub-board 34 in the second direction, and the second sub-board 35 is disposed on a side of the first sub-board 34 facing away from the bracket 10. Specifically, the first sub-board 34 is integrally formed with the two first terminals 32. Two fourth terminals 36 are arranged on one side of the first sub-board 34 facing the second sub-board 35, two fifth terminals 37 are arranged on one side of the second sub-board 35 facing the first sub-board 34, and the fourth terminals 36 and the fifth terminals 37 are in one-to-one corresponding plug connection to realize electric connection. One of the fourth terminal 36 and the fifth terminal 37 is used for transmitting a power signal, and the other of the fourth terminal 36 and the fifth terminal 37 is used for transmitting a data signal. The two third terminals 33 are disposed on a side of the second sub-board 35 facing away from the first sub-board 34.

The circuit board main body 31 is divided into a first sub-board 34 and a second sub-board 35, and a storage module can be further arranged on the second sub-board 35 to store the data of the circuit breaker.

Of course, in other embodiments, the first circuit board 30 may be a unitary structure, which is not limited herein.

Optionally, with continued reference to fig. 1, the bracket main body 13 is convexly provided with a limiting post 70 along the first direction, and the limiting post 70 is disposed through the first sub-board 34 and the second sub-board 35. The transformer mechanism 100 further includes a fixing member, which is inserted through the bracket 10 to fixedly connect the first daughter board 34 with the bracket main body 13, and is inserted through the limit post 70 to fixedly connect the second daughter board 35 with the limit post 70. Thus, the first circuit board 30 is fixed on the bracket main body 13, and displacement of the first circuit board 30 is avoided. Optionally, the fixing member is a fixing screw.

Further, a plurality of limit posts 70, specifically four, are arranged on the bracket main body 13, four limit posts 70 are enclosed to form a rectangle, and all limit posts 70 penetrate through the first sub-board 34 and the second sub-board 35, so that the limit effect on the first sub-board 34 and the second sub-board 35 is ensured. It will be appreciated that in other embodiments, the number of the stopper posts 70 is not limited, e.g., one, two, three, or more than four stopper posts 70 may be provided.

In another embodiment of the present application, the transformer mechanism 100 included in the circuit breaker has the same beneficial effects as the circuit breaker, and the description thereof is omitted herein.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (11)

1. A transformer mechanism, comprising:

a bracket (10) having a mounting groove (11) formed at one end in a first direction;

A current transformer (20) mounted in the mounting groove (11);

The first circuit board (30) comprises a circuit board main body (31), the circuit board main body (31) is arranged at one end of the bracket (10) which is far away from the mounting groove (11) in the first direction, and the current transformer (20) is electrically connected with the control module (200) through the circuit board main body (31);

The first circuit board (30) further comprises two first terminals (32) which are respectively connected to the two ends of the circuit board main body (31) in the second direction, wherein the two first terminals (32) are respectively extended away from the circuit board main body (31) in the first direction and are respectively inserted into the two inserting grooves (12);

wherein the first direction intersects the second direction.

2. The transformer mechanism according to claim 1, wherein one of the two first terminals (32) is used for transmitting a power signal and the other is used for transmitting a data signal.

3. The transformer mechanism according to claim 1, further comprising a second wiring board (40), the second wiring board (40) being provided at an end of the bracket (10) having the mounting groove (11) in the first direction, and a side of the second wiring board (40) facing the first wiring board (30) having two second terminals (41) arranged at intervals in the second direction;

The two first terminals (32) are electrically connected to the two second terminals (41) in a one-to-one correspondence.

4. The transformer mechanism according to claim 1, characterized in that the bracket (10) has at least two of the mounting slots (11), the mounting slots (11) being arranged along the second direction;

The number of the current transformers (20) is at least two, and the current transformers are correspondingly arranged in the mounting grooves (11) one by one, and/or

The current transformer (20) comprises a current transformer (21) for metering and a current transformer (22) for protection.

5. The transformer mechanism of claim 1, further comprising a wire connector (60), the wire connector (60) extending along a third direction and being interposed in the current transformer (20), the first direction, the second direction, and the third direction intersecting one another;

The bracket (10) has a transformer isolation plate (15), and the transformer isolation plate (15) is abutted against the surface of the wiring piece (60) facing the wiring board main body (31) for isolating an arc.

6. The transformer mechanism according to claim 1, wherein the bracket (10) comprises a bracket main body (13) and two plug-in parts (14), the two plug-in parts (14) are arranged at intervals along the second direction, one end of each plug-in part (14) is connected with the bracket main body (13), and the other end of each plug-in part extends away from the bracket main body (13) along a third direction;

The mounting groove (11) is formed in the support main body (13), each plugging portion (14) is provided with one plugging groove (12), the first circuit board (30) is matched with the shape of the support (10), the circuit board main body (31) is attached to the support main body (13), and the first terminal (32) is plugged into the plugging groove (12) of the plugging portion (14).

7. The transformer mechanism according to claim 1, characterized in that the circuit board body (31) has two third terminals (33) arranged at intervals on a side facing away from the bracket (10) in the first direction, the two third terminals (33) being for electrical connection with the control module (200);

One of the two third terminals (33) is used for transmitting a power signal, and the other is used for transmitting a data signal.

8. The transformer mechanism according to claim 7, wherein the circuit board main body (31) comprises a first sub-board (34) and a second sub-board (35) which are separately arranged, the first sub-board (34) is attached to the bracket (10), two first terminals (32) are respectively connected with two ends of the first sub-board (34) along the second direction, and the second sub-board (35) is arranged on one side of the first sub-board (34) away from the bracket (10);

The two third terminals (33) are arranged on one side of the second sub-board (35) opposite to the first sub-board (34).

9. The transformer mechanism according to claim 8, wherein two fourth terminals (36) and fifth terminals (37) are respectively provided on one side of the first and second sub-boards (34, 35) facing each other, the fourth terminals (36) and the fifth terminals (37) being electrically connected in one-to-one correspondence, wherein one of the fourth and fifth terminals (36, 37) is configured to transmit a power signal, and the other of the fourth and fifth terminals (36, 37) is configured to transmit a data signal.

10. The transformer mechanism according to claim 8, wherein a limit post (70) is convexly arranged on the bracket (10) along the first direction, and the limit post (70) is penetrated through the first daughter board (34) and the second daughter board (35);

the transformer mechanism further comprises a fixing piece, wherein the fixing piece penetrates through the support (10) to fixedly connect the first daughter board (34) with the support (10), and the fixing piece penetrates through the limit column (70) to fixedly connect the second daughter board (35) with the limit column (70).

11. A circuit breaker comprising a transformer mechanism as claimed in any one of claims 1 to 10.