Magnetic flux release and circuit breaker

Abstract

The utility model discloses a magnetic flux release and a circuit breaker. The magnetic flux release comprises a release shell, a coil assembly and an actuating rod. The first end of the actuating rod extends out of the coil assembly, the actuating rod and the coil assembly are arranged in a sliding mode, and after the coil assembly is powered on, the actuating rod generates offset. The device further comprises a push rod assembly, and the push rod assembly comprises a first push rod and a second push rod. The first push rod and the first end of the actuating rod are connected and move synchronously; the second push rod and the release shell are rotationally arranged, the second push rod comprises a driving end and a triggering end, the driving end and the first push rod form linkage, and the triggering end is used for being matched with an operating mechanism of the circuit breaker; the multi-section transmission mechanism has the characteristic of multi-section transmission.

Description

Technical Field

[0001] The present application relates to the electrical field, and to a circuit breaker, and in particular to a flux release. Background Art

[0002] Magnetic flux releases are widely used in the field of circuit breakers, for example, they are used as actuators in electronic molded case circuit breakers or leakage circuit breakers. When the existing magnetic flux releases are used in molded case circuit breakers, their transmission relationship is relatively simple, and generally the actuating rod of the magnetic flux release is used to drive a push rod to rotate or drive a push rod to rotate to trigger the operating mechanism of the circuit breaker. This single transmission relationship makes it difficult to design the transmission ratio and the design space is small. For example, a modular molded case circuit breaker disclosed in CN214378280U uses a magnetic flux release, and the moving iron core (that is, the actuating rod) only drives a push rod to rotate. Therefore, due to the consideration of the transmission ratio, the design of the push rod will be relatively slender, and the design space will also be relatively small.

[0003] Therefore, how to design a multi-stage transmission relationship so that the transmission ratio can be designed with a flux release with more margin is a direction worth studying. Summary of the invention

[0004] In view of this, the purpose of this application is to overcome the deficiencies in the prior art and to provide a flux release having the characteristics of a multi-stage transmission relationship.

[0005] The present application provides: a magnetic flux release, which includes a release housing, a coil assembly and an actuating rod; the first end of the actuating rod extends from the coil assembly, the actuating rod and the coil assembly are slidably arranged, and the actuating rod generates an offset when the coil assembly is energized; wherein, it also includes a push rod assembly, the push rod assembly includes a first push rod and a second push rod; the first push rod is connected to the first end of the actuating rod and the two are in a synchronous motion relationship; the second push rod is rotatably arranged with the release housing, the second push rod includes a driving end and a triggering end, the driving end forms a linkage with the first push rod, and the triggering end is used to cooperate with the operating mechanism of the circuit breaker.

[0006] Compared with the single push rod in the prior art, this structure uses two push rods to form a linkage relationship, and the first push rod is set to slide and the second push rod is set to rotate to form a transmission relationship. Such a two-stage transmission relationship makes the transmission ratio easier to design and provides more design space.

[0007] In some embodiments of the present application, the distance from the driving end to the rotation center of the second push rod is smaller than the distance from the triggering end to the rotation center of the second push rod.

[0008] By adopting this structure and controlling the size, it is equivalent to controlling the force arm relationship, so that the driving force from the flux release is converted into a force suitable for driving the operating mechanism through the force arm.

[0009] In some embodiments of the present application, a first push rod and a driving end, one of which is provided with a driving protrusion, and the other is provided with a driving groove, and the driving protrusion extends into the driving groove to form a linkage with the groove wall of the driving groove.

[0010] By adopting this structure to form a linkage relationship, the first push rod and the second push rod are also very convenient to connect, and it is only necessary to insert the driving protrusion into the driving groove.

[0011] In some embodiments of the present application, the release housing includes a first shell, a partition and a cover; the first shell forms a accommodating space and has an opening on one side of the first shell, and the cover is used to fix and close the opening with the first shell; the partition is used to divide the accommodating space into a first space and a second space; the coil assembly and the actuator rod are in the first space; the second push rod is in the second space, and the second push rod is rotatably connected to the partition.

[0012] With this structure, the design of the partition divides the space in the first shell, which makes the distribution of the internal components more coordinated and the assembly more convenient.

[0013] In some embodiments of the present application, a positioning column is provided on the partition, a pivot hole is opened on the second push rod, and the pivot hole is sleeved on the positioning column to form a rotational connection between the second push rod and the partition.

[0014] The design of this structure will be beneficial to the assembly of the second push rod.

[0015] In some embodiments of the present application, the flux release further includes a first spring, a second spring and a reset button; the first spring is arranged between the first push rod and the coil assembly, and the second spring is arranged between the reset button and the release housing; the first push rod has a first position and a second position, the first position is the position when the flux release is not working, and the second position is the position after the flux release is working, and the first push rod is closer to the coil assembly than the first position in the second position; when the first push rod is in the second position, the first spring is in a deformed state, and the first spring gives the first push rod a force to move toward the first position; the reset button has a third position and a fourth position, and the third position is the position of the flux release. The first position is the position when the flux release is not working, and the fourth position is the position after the flux release is working; when the reset button is in the third position, the second spring is in a deformed state, and the second spring gives the reset button a force to move toward the fourth position; when the first push rod is in the second position, the reset button is in the fourth position and resists on one side of the first push rod to limit the sliding of the first push rod; when the reset button is in the third position, the first push rod is in the first position and resists on one side of the reset button to limit the sliding of the reset button; the reset button is set to slide, and the sliding direction of the reset button is perpendicular to the sliding direction of the first push rod; the reset button includes a pressing part, and the pressing part is set beyond the upper surface of the release housing for user operation.

[0016] This structure is more suitable for a pull-in type magnetic flux release. The reset force of the pull-in type magnetic flux release comes from the first spring. Through the first spring, the first push rod, the second spring, and the reset button, the first push rod can be reset under the action of the first spring through the pressing part. The reset structure is very simple.

[0017] In some embodiments of the present application, the reset button includes a main body, a matching portion and a spring supporting portion; the main body is located on the outer surface of the release housing; a mounting hole is provided on the release housing, the spring supporting portion and the matching portion are both connected to the main body, and the spring supporting portion and the matching portion are installed in the release housing through the mounting hole; the spring supporting portion is used to be connected to one end of the second spring; the resisting relationship between the first push rod and the reset button is formed by two adjacent surfaces of the matching portion and the first push rod.

[0018] With this structure, the design of the mounting hole will facilitate the installation of the matching portion and the spring abutting portion. The design of the matching portion will facilitate the formation of an abutting relationship (two abutting relationships) with the first push rod.

[0019] In some embodiments of the present application, after the flux release is working, the actuating rod is offset in a direction away from the coil assembly; it also includes a reset button, which is slidably arranged on the upper surface of the release housing, and the reset button and the first push rod are in a synchronous movement relationship.

[0020] This structure is more suitable for self-holding flux releasers. Since the reset button is arranged on the upper surface of the release housing, the user can directly push the reset button to slide to reset the flux release.

[0021] A circuit breaker comprises a base, a middle cover, a top cover, an operating mechanism and a contact system; the top cover is arranged on the middle cover, and the middle cover is arranged on the base; the contact system is arranged in a space formed by the base and the middle cover; the operating mechanism is used to drive the contact system to move so as to realize the connection and disconnection of the contact system; wherein a second installation space is formed on the middle cover, and the opening of the second installation space faces the top cover; the above-mentioned magnetic flux release is arranged in the second installation space, and the trigger end of the magnetic flux release cooperates with the traction rod of the operating mechanism.

[0022] With this structure, the magnetic flux release can be installed in the second installation space.

[0023] In some embodiments of the present application, a microswitch, a trigger rod and a reset spring are also provided in the release housing; the trigger rod is slidably arranged and one end is near the rotating shaft of the contact system; the microswitch is connected in series to the control circuit of the coil assembly, and when the microswitch is triggered, the control circuit is cut off; the trigger rod has an original state and a triggered state, when the trigger rod is in the original state, the reset spring is not deformed, and the trigger rod does not squeeze the button of the microswitch; when the trigger rod is in the triggered state, the reset spring is in a deformed state, and the trigger rod squeezes the button of the microswitch; when the contact system is disconnected, the rotating shaft presses the trigger rod to put it in the triggered state.

[0024] Through the design of this micro switch, when the circuit breaker is in the disconnected state, the trigger rod triggers the micro switch to disconnect the coil assembly. Such a structure can be applied to the situation where the line is reversed to prevent the coil assembly from burning out due to being energized all the time. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 An exploded view of a molded case circuit breaker according to an embodiment of the present application is shown;

[0027] Figure 2 A diagram showing the relationship between the flux release and the operating mechanism in the embodiment of the present application is shown;

[0028] Figure 3An exploded view of a magnetic flux release (self-holding coil solution) in an embodiment of the present application is shown;

[0029] Figure 4 A schematic diagram of the structure of the magnetic flux release (self-holding coil solution) in the embodiment of the present application when it is not working is shown;

[0030] Figure 5 A schematic diagram of the structure of the magnetic flux release (self-holding coil solution) after actuation in an embodiment of the present application is shown;

[0031] Figure 6 An exploded view of a magnetic flux release (pull-in coil solution) in an embodiment of the present application is shown;

[0032] Figure 7 A schematic diagram of the structure of the magnetic flux release (pull-in coil solution) in the embodiment of the present application after the cover is removed is shown;

[0033] Figure 8 The schematic diagram of the structure of the magnetic flux release (pull-in coil solution) in the embodiment of the present application after removing the cover, the partition and the second push rod is shown;

[0034] Fig. 9 A three-dimensional diagram of a magnetic flux release (pull-in coil solution) in an embodiment of the present application is shown;

[0035] Fig.10 The schematic diagram of the structure of the magnetic flux release (pull-in coil solution) and the transmission member in the embodiment of the present application (when not working) is shown;

[0036] Fig.11 The schematic diagram of the structure of the magnetic flux release (pull-in coil solution) and the transmission member in the embodiment of the present application (after actuation) is shown;

[0037] Fig.12 A schematic diagram showing the structure of a magnetic flux release (pull-in coil solution) in an embodiment of the present application in which the first push rod is in the first position and the reset button is in the third position;

[0038] Fig.13 A schematic diagram showing the structure of the magnetic flux release (pull-in coil solution) in an embodiment of the present application, in which the first push rod is in the second position and the reset button is in the fourth position;

[0039] Fig.14 A schematic diagram showing the state of the micro switch when the contact system in the embodiment of the present application is in the on state;

[0040] Fig.15 A schematic diagram of the state of the micro switch when the contact system is in the disconnected state in the embodiment of the present application is shown. DETAILED DESCRIPTION

[0041] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0042] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0043] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0044] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "electrically connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed electrical connection, a detachable electrical connection, or an integrated one; it can be a mechanical electrical connection, or an electrical electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0045] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature. Example

[0046] like Figure 1-Figure 15 As shown, the embodiment of the present application is a circuit breaker, which comprises a base 100, a middle cover 200, a top cover 300, an operating mechanism, a contact system, a magnetic flux release 400 and a leakage protection circuit.

[0047] The base 100 is fixed to the middle cover 200, and the top cover 300 is fixed to the middle cover 200. The fixing here is fastened by bolts. Of course, other methods such as clamping fixation, riveting fixation, etc. can also be used for fixing.

[0048] The operating mechanism includes a handle, a lever, a trip button, a lock button, a re-lock button, an upper connecting rod, a lower connecting rod, a main spring and a traction rod 501. When the operating mechanism is in the closed state, the trip button, the lock button and the re-lock button form a steady state. When this steady state is broken, the operating mechanism will perform the opening operation under the action of the main spring. There are several main ways to break the steady state here. One is caused by the user directly operating the handle, and the other is caused by the rotation of the traction rod 501 after an abnormality occurs in the protected line, such as a short circuit, overload, leakage, etc. (the rotation of the traction rod 501 will cause the rotation of the re-lock button). When one of the situations such as short circuit, overload, leakage, etc. occurs, the magnetic flux release 400 will be actuated to drive the traction rod 501 to rotate. Most of the operating mechanism is in the space formed by the base 100 and the middle cover 200, and only a part of the handle is set through the middle cover 200 and the top cover 300.

[0049] The contact system is driven by the operating mechanism to move, thereby realizing the connection and disconnection of the main circuit.

[0050] This kind of flux release is specifically as follows:

[0051] A first installation space and a second installation space 202 are formed on the middle cover 200, and a partition wall is provided between the first installation space and the second installation space 202. The first installation space is used to set a part of the operating mechanism, and the rest of the operating mechanism is located in the base 100, and a part of the lever of the operating mechanism is located in the first installation space. The magnetic flux release 400 is arranged in the second installation space 202.

[0052] In this embodiment, the transmission structure of the magnetic flux release 400 driving the traction rod 501 is as follows:

[0053] like Figure 3-13 As shown, the flux release 400 includes a release housing 401, a coil assembly 402, an actuating rod 403 and a push rod assembly.

[0054] The release housing 401 includes a first housing 401a, a partition 401b and a cover 401c. The first housing 401a forms a storage space and has an opening on the side of the first housing 401a. The cover 401c is used to fix and close the opening with the first housing 401a. Here, the cover 401c and the first housing 401a are fastened by screws, and of course, a snap-fit ​​fit can also be used. The partition 401b is fixed in the first housing 401a. Here, the partition 401b is supported by the cover 401c and the first housing 401a. Of course, the partition 401b can also be fixed to the first housing 401a and the cover 401c separately (for example, screws). Here, the partition 401b divides the storage space into a first space 401d and a second space 401e.

[0055] The coil assembly 402, including the coil, the frame, the internal iron core, etc., is common knowledge in the art.

[0056] The actuating rod 403 and the coil assembly 402 are arranged to slide, and the first end of the actuating rod 403 extends from the coil assembly 402. When the coil is energized, the actuating rod 403 will slide. There are two ways of sliding here, one is sliding toward the direction where the coil assembly 402 is located (also called a pull-in coil), and the other is sliding away from the direction where the coil assembly 402 is located (also called a self-holding coil). No matter which sliding method (pull-in coil or self-holding coil) is used, it is common knowledge in the art.

[0057] The push rod assembly includes a first push rod 404 and a second push rod 405 .

[0058] The first push rod 404 is connected to the first end of the actuating rod 403 and the two are in a synchronous motion relationship. Here, the synchronous motion relationship can be understood as the first push rod 404 being fixed to the first end of the actuating rod 403. The fixation here can be a snap-fit ​​fixation, an interference fit, a screw fastening, etc. In this way, when the actuating rod 403 is actuated, the first push rod 404 slides. In this embodiment, the coil assembly 402, the actuating rod 403, and most of the first push rod 404 are in the first space 401d.

[0059] The second push rod 405 is rotatably arranged on the release housing 401, specifically, the second push rod 405 is rotatably arranged on the partition 401b and is located in the second space 401e. A pivot hole 405a is provided on the second push rod 405, and a positioning column 401f is provided on the partition 401b. The pivot hole 405a is rotatably connected by being sleeved on the positioning column 401f. The second push rod 405 here includes a driving end 405b and a triggering end 405a. Neither the driving end 405b nor the triggering end 405a is the rotation center of the second push rod 405. The driving end 405b here is linked with the first push rod 404, and a part of the triggering end 405a extends to the side of the traction rod 501 of the operating mechanism (used to trigger the traction rod 501). At the same time, the distance between the driving end 405b and the rotation center of the second push rod 405 is smaller than the distance between the trigger end 405a and the rotation center of the second push rod 405. It can also be understood that the force arm of the driving end 405b is smaller than the force arm on the trigger end 405a. In this embodiment, the driving end 405b is a driving groove 405b1, and the first push rod 404 has a driving protrusion 404a. The driving protrusion 404a extends into the driving groove 405b1 to achieve linkage.

[0060] Of course, there are many other linkage methods besides these, such as swapping the structures of the two, or directly hingedly connecting the two together, etc., as long as the sliding of the first push rod 404 can be converted into the rotation of the second push rod 405.

[0061] For different types of driving modes of the magnetic flux release 400 (the driving modes of the coil are different, divided into a pull-in coil and a self-holding coil), the transmission connection mode between the transmission member 600 and the magnetic flux release 400 is also different.

[0062] The first way, such as Figure 6-13As shown, taking the magnetic flux release 400 of the pull-in coil as an example, the magnetic flux release 400 also includes a first spring 406, a second spring 407 and a reset button 408. Here, the first spring 406 abuts between the first push rod 404 and the coil assembly 402, and the second spring 407 abuts between the reset button 408 and the release housing 401. The first push rod 404 has a first position and a second position. The first position is the position when the magnetic flux release 400 is not working, and the second position is the position after the magnetic flux release 400 is working (at this time, the first spring 406 is in a deformed state, and the first spring 406 gives the first push rod 404 a force to move toward the first position). When the magnetic flux release 400 is working (the coil assembly 402 is energized), the first push rod 404 moves from the first position to the second position. Here, the first push rod 404 is closer to the coil assembly 402 in the second position than in the first position. Of course, in this embodiment, the first spring 406 and the second spring 407 are both compression springs. In addition, the first spring 406 and the second spring 407 can also be springs of other forms such as spring leaves, torsion springs, tension springs, etc., as long as they can play the same role.

[0063] The reset button 408 is slidably arranged with the release housing 401, and the sliding direction of the reset button 408 is perpendicular to the sliding direction of the first push rod 404. Here, the reset button 408 has a third position and a fourth position. The third position is the position when the magnetic flux release 400 is not working (at this time, the second spring 407 is in a deformed state, and the second spring 407 gives the reset button 408 a force to move toward the fourth position), and the fourth position is the position after the magnetic flux release 400 is working.

[0064] In this embodiment, the reset button 408 includes a main body 408a, a pressing portion 408b, a matching portion 408c and a spring abutting portion 408d. The main body 408a is located outside the release housing 401.

[0065] Here, the pressing portion 408b is arranged beyond the upper surface of the release housing 401, so that it is convenient for the user to press the reset button 408 to reset the first push rod 404 (reset the magnetic flux release 400). Here, the pressing portion 408b and the main body 408a are integrally formed, and of course, they can also be formed separately and then assembled together.

[0066] Here, the release housing 401 is provided with a mounting hole 4010, and the spring abutting portion 408d and the matching portion 408c can penetrate into the release housing 401 through the mounting hole 4010 and respectively match the first spring 406 and the first push rod 404. Here, the spring abutting portion 408d and the matching portion 408c are both connected to the main body 408a. In this embodiment, the spring abutting portion 408d and the matching portion 408c are integrally formed with the main body 408a. Of course, in addition to this, the method of split molding and then assembling together can also be adopted. Here, the relationship 1 and the relationship 2 between the reset key 408 and the first push rod 404 are formed by two adjacent surfaces of the matching portion 408c and the first push rod 404.

[0067] Here, the relationship between the reset button 408 and the first push rod 404 is the following two sets of relationships:

[0068] Relationship 1: When the first push rod 404 is in the second position, the reset button 408 is in the fourth position, and the first push rod 404 is blocked by the reset button 408. Therefore, even if the first spring 406 is in a deformed state, the first push rod 404 cannot be restored to the first position. Only when the reset button 408 is out of the fourth position, the first push rod 404 can be restored to the first position under the action of the first spring 406. Here, the reset button 408 can be disengaged from the fourth position and moved to the third position through the pressing portion 408b to release the reset button 408 from blocking the first push rod 404, and the first push rod 404 is restored to the first position under the action of the first spring 406.

[0069] Relationship 2: When the reset key 408 is in the third position, the reset key 408 is blocked by the first push rod 404. Therefore, even if the second spring 407 is in a deformed state, the reset key 408 cannot be restored to the fourth position. Only when the first push rod 404 is out of the first position, the reset key 408 can be restored to the fourth position under the action of the second spring 407. The first push rod 404 is out of the first position in that the coil assembly 402 is energized, and the actuating rod is actuated to drive the first push rod 404 out of the first position, so as to release the first push rod 404 from blocking the reset key 408, and the reset key 408 is reset to the fourth position under the action of the second spring 407.

[0070] The two relationships mentioned above are converted back and forth.

[0071] The second method, such as Figure 3-5As shown, taking the flux releaser 400 of the self-holding coil as an example, in this embodiment, after the flux releaser 400 works, the actuating rod 403 is offset in the direction away from the coil assembly 402, and after the coil assembly 402 loses power, the actuating rod 403 is in the actuated position. In this embodiment, a reset button 408 can also be provided, so that it is also convenient for the user to push the reset button 408 to reset the first push rod 404 (reset the flux releaser 400). The reset button 408 is provided on the upper surface of the releaser housing 401, and the reset button 408 is provided in a sliding manner. Here, the reset button 408 and the first push rod 404 are in a synchronous motion relationship. In this embodiment, the reset button 408 and the first push rod 404 are locked to form a synchronous motion. Of course, in addition to this, the reset button 408 and the first push rod 404 can also be connected together by other methods such as integral molding, interference fit, screw fastening, etc., as long as the movement synchronization between the two can be ensured.

[0072] Regardless of which embodiment of the magnetic flux release is described above, it includes a micro switch 700, a trigger rod 701 and a reset spring 702, and the micro switch 700, the trigger rod 701 and the reset spring 702 are arranged in the second space 401e. The trigger rod 701 is arranged to slide vertically, and one end of the trigger rod 701 passes through the release housing 401 to the vicinity of the rotating shaft 800 of the contact system. The reset spring 702 is abutted against the trigger rod 701 and the release housing 401, and is used to reset the trigger rod 701 after being triggered. The micro switch 700 is arranged on one side of the trigger rod 701. When not triggered, the button of the micro switch 700 is inside the avoidance groove 701a of the trigger rod 701. When triggered, the button of the micro switch 700 is triggered by the trigger rod 701. Here, the micro switch 700 is connected in series to the control circuit of the coil assembly 402. The control circuit is only turned on when the micro switch 700 is not triggered. When the micro switch 700 is triggered, the control circuit is cut off. Here, the trigger rod 701 has two states, one is the triggered state (the corresponding contact system is in the disconnected state). In this state, the reset spring 702 is in a deformed state, and the trigger rod 701 squeezes the button of the micro switch 700. At the same time, because a part of the rotating shaft 800 abuts against the trigger rod 701, it remains in the triggered state, and the micro switch 700 is triggered. The other state is the original state. In this state, the reset spring 702 is in an undeformed state, the trigger rod 701 is not pushed by the rotating shaft 800, and the micro switch 700 is not triggered.

[0073] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. 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. In addition, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without contradiction.

[0074] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A magnetic flux release, comprising a release housing, a coil assembly and an actuating rod; the first end of the actuating rod extends from the coil assembly, the actuating rod and the coil assembly are slidably arranged, and the actuating rod generates an offset when the coil assembly is energized; characterized in that: It also includes a push rod assembly, which includes a first push rod and a second push rod; the first push rod is connected to the first end of the actuating rod and the two are in a synchronous motion relationship; the second push rod is rotatably arranged with the release housing, and the second push rod includes a driving end and a triggering end, the driving end is linked with the first push rod, and the triggering end is used to cooperate with the operating mechanism of the circuit breaker.

2. A magnetic flux release according to claim 1, characterized in that: The distance from the driving end to the rotation center of the second push rod is smaller than the distance from the triggering end to the rotation center of the second push rod.

3. A magnetic flux release according to claim 1, characterized in that: The first push rod and the driving end, one of the two is provided with a driving protrusion, and the other is provided with a driving groove, the driving protrusion extends into the driving groove and forms a linkage with the groove wall of the driving groove.

4. A magnetic flux release according to claim 1, characterized in that: The release housing comprises a first housing, a partition and a cover; the first housing forms a receiving space and has an opening on one side of the first housing, and the cover is used to fix with the first housing to close the opening; The partition is used to divide the accommodating space into a first space and a second space; the coil assembly and the actuating rod are located in the first space; the second push rod is located in the second space, and the second push rod is rotatably connected to the partition.

5. A magnetic flux release according to claim 4, characterized in that: The partition is provided with a positioning column, and the second push rod is provided with a pivot hole, which is sleeved on the positioning column so that the second push rod is rotatably connected with the partition.

6. A magnetic flux release according to claim 1, characterized in that: The magnetic flux release also includes a first spring, a second spring and a reset button; the first spring is arranged between the first push rod and the coil assembly, and the second spring is arranged between the reset button and the release housing; the first push rod has a first position and a second position, the first position is the position when the magnetic flux release is not working, and the second position is the position after the magnetic flux release is working, and the first push rod is closer to the coil assembly than the first position in the second position; when the first push rod is in the second position, the first spring is in a deformed state, and the first spring gives the first push rod a force to move toward the first position; the reset button has a third position and a fourth position, and the third position is the position when the magnetic flux release is not working The fourth position is the position after the magnetic flux releaser works; when the reset button is in the third position, the second spring is in a deformed state, and the second spring gives the reset button a force to move toward the fourth position; when the first push rod is in the second position, the reset button is in the fourth position and resists on one side of the first push rod to limit the sliding of the first push rod; when the reset button is in the third position, the first push rod is in the first position and resists on one side of the reset button to limit the sliding of the reset button; the reset button is set to slide, and the sliding direction of the reset button is perpendicular to the sliding direction of the first push rod; the reset button includes a pressing portion, and the pressing portion is set beyond the upper surface of the release housing for user operation.

7. A magnetic flux release according to claim 6, characterized in that: The reset button includes a main body, a matching part and a spring supporting part; the main body is located on the outer surface of the release housing; a mounting hole is provided on the release housing, the spring supporting part and the matching part are both connected to the main body, and the spring supporting part and the matching part are installed in the release housing through the mounting hole; the spring supporting part is used to be connected to one end of the second spring; the resisting relationship between the first push rod and the reset button is formed by the two adjacent surfaces of the matching part and the first push rod.

8. A magnetic flux release according to claim 1, characterized in that: After the magnetic flux release is working, the actuating rod is offset in a direction away from the coil assembly; the device also includes a reset button which is slidably arranged on the upper surface of the release housing, and the reset button and the first push rod are in a synchronous motion relationship.

9. A circuit breaker, comprising a base, a middle cover, a top cover, an operating mechanism and a contact system; the top cover is arranged on the middle cover, and the middle cover is arranged on the base; the contact system is arranged in the space formed by the base and the middle cover; the operating mechanism is used to drive the contact system to move, so as to realize the connection and disconnection of the contact system; characterized in that: A second installation space is formed on the middle cover, and the opening of the second installation space faces the top cover; a magnetic flux release as described in any one of claims 1 to 8 is arranged in the second installation space, and the trigger end of the magnetic flux release cooperates with the traction rod of the operating mechanism.

10. A circuit breaker according to claim 9, characterized in that: A micro switch, a trigger rod and a reset spring are also provided in the release housing; the trigger rod is slidably arranged and one end of the trigger rod is near the rotating shaft of the contact system; the micro switch is connected in series to the control circuit of the coil assembly, and when the micro switch is triggered, the control circuit is cut off; the trigger rod has an original state and a triggered state, when the trigger rod is in the original state, the reset spring is not deformed, and the trigger rod does not squeeze the button of the micro switch; when the trigger rod is in the triggered state, the reset spring is in a deformed state, and the trigger rod squeezes the button of the micro switch; when the contact system is disconnected, the rotating shaft presses the trigger rod to put it in the triggered state.

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