Circuit breaker device with thermomagnetic tripping function

Abstract

The utility model discloses a circuit breaker device with a thermomagnetic tripping function, which comprises a plurality of interphase grooves arranged on a base and a plurality of insulation baffles formed among the interphase grooves, isolation plates are arranged in groove holes of the insulation baffles, isolation raised lines are arranged at the tops of the isolation plates, and the insulation raised lines are arranged in the groove holes of the insulation baffles. A first isolation boss and a second isolation boss which are distributed at the two ends of the isolation plate are arranged on the isolation protruding strip in a staggered mode, and when the isolation plate is inserted into the groove hole through the limiting insertion groove, the first isolation boss and the second isolation boss are driven to abut against the top of the insulation baffle. By means of the design, a plurality of isolation faces used for preventing electric arcs from passing through are formed between the isolation plate and the groove hole and between the isolation plate and the insulation baffle respectively so as to isolate installation gaps and increase creepage distance, insulation isolation between phases of the circuit breaker is achieved by adopting the isolation plate of the technical scheme, safe electrical distance between the phases is guaranteed, and the service life of the circuit breaker is prolonged. Creepage and arc channeling phenomena are avoided, and the electrical insulation performance of the product is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to circuit breaker technical field, concretely relates to a circuit breaker device with thermal magnetic tripping function. BACKGROUND

[0002] The plastic shell circuit breaker has overload long delay and short circuit instantaneous protection function, and is commonly used as terminal switch or branch switch in low voltage distribution system, and replaces the past commonly used fuse and switch. The plastic shell circuit breaker can automatically cut off current when the current exceeds the tripping setting, and the plastic shell refers to using plastic insulator as the shell of the device to isolate the conductors and the grounded metal part. The plastic shell circuit breaker has terminal posts at both ends, and the static contact is used to connect the terminal post and the moving contact, thereby realizing the passage of the entire circuit breaker.

[0003] The existing plastic shell circuit breaker mainly comprises a base, a middle cover, an upper cover, an operating mechanism, a rotating shaft, a moving contact, a static contact and an arc extinguishing chamber. Since the plastic shell circuit breaker adopts a three-phase line structure, three contact grooves for mounting and accommodating three moving contacts and three static contacts are arranged in the base. The rotating shaft is rotatably arranged on the base and penetrates the three contact grooves, so that the three moving contacts are mounted on the same rotating shaft to realize synchronous rotation. Two partitions are arranged on the base to sequentially separate the three contact grooves, and a slot hole is formed in the partition to allow the rotating shaft to penetrate. In order to ensure the electrical safety between phases, a baffle is arranged in the corresponding slot hole to isolate the phases. However, there is an obvious gap between the baffle and the partition, and the safety creepage distance between phases is not enough, which can easily cause the arc between the contacts to jump from the gap position, resulting in a phase-to-phase short circuit accident, poor safety, and affecting the performance of the product. SUMMARY

[0004] Therefore, the utility model solves the technical problem that the baffle and the partition are connected with an obvious gap, the safety creepage distance between phases is not enough, which can easily cause the arc between phases to jump and the creepage short circuit accident to occur, poor safety, and affects the performance of the product, thereby providing a circuit breaker device that ensures a safe electrical distance between phases of the circuit breaker, avoids the occurrence of creepage and arc jumping phenomenon, and improves the electrical insulation performance of the product.

[0005] To solve the above technical problems, the utility model provides a circuit breaker device with thermal magnetic tripping function, which comprises:

[0006] The base comprises a plurality of interphase grooves and a plurality of insulating baffles formed between the plurality of interphase grooves, and a plurality of slot holes are arranged on the plurality of insulating baffles to allow the rotating shaft to penetrate, and two limiting slots are arranged on the inner walls of both sides of the slot hole.

[0007] The isolation plate is inserted into the slot hole through the limiting slot, and a rotating shaft hole matched with the rotating shaft is formed between the isolation plate and the slot hole. The two side edges of the isolation plate are respectively inserted into the two limiting slots. The top of the isolation plate is formed with an isolation protruding strip extending from the top of the insulating baffle. The isolation protruding strip is provided with a first isolation boss and a second isolation boss distributed at the two ends of the top of the isolation plate. The first isolation boss and the second isolation boss respectively extend towards the two sides of the slot hole and abut against the top of the insulating baffle. The top of the insulating baffle is provided with a stepped blocking part matched with the first isolation boss and / or the second isolation boss. The second isolation boss and / or the first isolation boss has an embedded blocking part protruding downward and in contact with the inner wall of the slot hole.

[0008] As a preferred solution, the insulating baffle includes a first baffle part and a second baffle part arranged on the two sides of the slot hole. The first isolation boss and the isolation plate are connected to form a first blocking part matched with the first baffle part. The first blocking part is located on one side of the isolation plate.

[0009] As a preferred solution, the second isolation boss, the embedded blocking part and the isolation plate are connected to form a second blocking part matched with the second baffle part. The second blocking part is located on the other side of the isolation plate.

[0010] As a preferred solution, the first isolation boss is formed on one side of the isolation protruding strip, the second isolation boss is formed on the other side of the isolation protruding strip, the top of the isolation plate is flush with the top of the insulating baffle, and the isolation protruding strip is higher than the first baffle part and the second baffle part.

[0011] As a preferred solution, the slot hole is a U-shaped slot structure, the bottom of the isolation plate is provided with a circular arc slot structure, the rotating shaft has a plurality of contact mounting segments accommodated in a plurality of interphase grooves, and the movable contact is mounted on the contact mounting segment.

[0012] As a preferred solution, it further includes a plurality of thermal magnetic tripping mechanisms arranged in the plurality of interphase grooves, respectively. The thermal magnetic tripping mechanism includes:

[0013] A magnetic yoke connected to the conductive plate and fixed in the interphase groove;

[0014] A movable armature rotatably connected to the two side walls of the interphase groove and arranged opposite to the magnetic yoke, and extending a push rod part for driving the action of the traction rod;

[0015] A reset structure including at least one armature spring arranged between the movable armature and the magnetic yoke. The armature spring applies an elastic force to the movable armature to rotate the driving part away from the side of the traction rod;

[0016] A thermal element is fixedly connected to the conductive plate and extends opposite the traction rod.

[0017] As a preferred solution, two rotating protrusions are arranged on two sides of the moving armature, rotating grooves are arranged on the two side walls of the inter-phase slot and matched with the two rotating protrusions, and the upper end of the rotating groove is an open end and the lower end is a circular arc end.

[0018] As a preferred solution, two upper hooks extending to one side of the magnetic yoke are formed on the top of the moving armature by bending, two lower hooks opposite to the two upper hooks are arranged on the top of the magnetic yoke, two armature springs are arranged between the two lower hooks and the two upper hooks, the lower hook is provided with at least one positioning slot for connecting one end of the armature spring, and the upper hook is provided with at least one positioning hole for connecting the other end of the armature spring.

[0019] As a preferred solution, a set of limiting blocks opposite to the moving armature are arranged in the inter-phase slot, the moving armature comprises a connecting part provided with a rotating protrusion and an attraction part extending obliquely below the connecting part, and the push rod part extends vertically on the connecting part, the attraction part is located between the magnetic yoke and the set of limiting blocks and abuts against the limiting blocks under the action of the armature spring.

[0020] As a preferred solution, the magnetic yoke has a U-shaped magnetic yoke slot, the conductive plate has an electric contact part extending through the magnetic yoke slot by bending, and the magnetic yoke and the thermal element are fixed on the electric contact part respectively.

[0021] Compared with the prior art, the technical scheme of the utility model has the following advantages:

[0022] 1. The circuit breaker device provided by the utility model, through setting the slot hole for the rotating shaft to pass through on the multiple insulation baffles, and setting the isolation plate in the slot hole, the side edges of the isolation plate are closely inserted into the limiting slot on both sides of the slot hole to reduce the gap, effectively prevent the electric arc from passing between the isolation plate and the slot hole, according to the isolation convex strip being arranged on the top of the isolation plate, and the first isolation boss and the second boss being distributed on both ends of the isolation plate are staggered on the isolation convex strip, when the isolation plate is inserted into the slot hole to shield the position of the slot hole, the first isolation boss and the second isolation boss are respectively abutted on the top of the insulation baffle on both sides of the slot hole, in order to further improve the insulation isolation effect, the step blocking part matched with the first isolation boss and / or the second isolation boss can be arranged on the top of the insulation baffle, or the embedded blocking part in contact with the inner wall of the slot hole can be arranged on the second isolation boss and / or the first isolation boss, the design makes the isolation plate and the slot hole and the insulation baffle form multiple isolation surfaces for blocking the electric arc respectively, so as to isolate the installation gap and increase the creepage distance, the isolation plate adopting the technical scheme realizes the insulation isolation between the phases of the circuit breaker, ensures the safe electrical distance between the phases, avoids the electric creep and arc jump phenomenon, and improves the electrical insulation performance of the product.

[0023] 2. The circuit breaker device provided by the utility model, the first isolation boss and the isolation plate are connected to form the first blocking part matched with the first baffle part, and the second isolation boss, the embedded blocking part and the isolation plate are connected to form the second blocking part matched with the second baffle part, and the contact is close, the structure is arranged, the creepage distance between the isolation plate and the insulation baffle is increased through the first blocking part and the second blocking part, and the safe electrical gap between the phases is ensured.

[0024] 3. The circuit breaker device provided by the utility model, the thermal magnetic trip mechanism is composed of a magnetic yoke, a movable armature, an armature spring and a thermal element, the movable armature is rotatably arranged on the side walls on both sides of the interphase groove, and the armature spring is connected between the movable armature and the magnetic yoke, compared with the traditional structure of the thermal magnetic trip mechanism, the bracket is cancelled, and the installation structure is simplified, the thermal magnetic trip mechanism with the structure has the advantages of simple structure, stable and reliable performance, convenient installation, sensitive tripping action, realizes the short-circuit protection and overload protection functions of the circuit breaker.

[0025] 4. The circuit breaker device provided by the utility model, two rotating protrusions are arranged on both sides of the movable armature, and the two rotating protrusions are connected in two rotating grooves on the side walls on both sides of the interphase groove, the lower end of the rotating groove is a circular arc end, which can ensure that the rotating protrusion can rotate flexibly in the rotating groove, thereby ensuring the sensitivity of the tripping action of the movable armature, and facilitating the assembly of the movable armature and the base, and the assembly efficiency is higher.

[0026] 5. The circuit breaker device, two upper hooks are formed on the top of the movable armature by bending, two lower hooks corresponding to the two upper hooks are arranged on the top of the magnetic yoke, the lower hook is provided with at least one positioning slot, the corresponding upper hook is provided with at least one positioning hole, the two ends of the armature spring are respectively hooked in the positioning slot and the positioning hole, so that the installation and connection of the armature spring between the movable armature and the magnetic yoke are realized, the assembly is more convenient, and the reset function of the movable armature after completing the tripping action is realized by using the armature spring. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the drawings needed to be used in the specific embodiments or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are some embodiments of the utility model, and other drawings can also be obtained by the drawings according to the drawings without creative labor for those skilled in the art.

[0028] Figure 1 The structural schematic diagram of the circuit breaker device is provided for the utility model;

[0029] Figure 2 The structural schematic diagram of the base of the utility model is provided for the utility model;

[0030] Figure 3 The structural schematic diagram of the isolation plate of the utility model is provided for the utility model;

[0031] Figure 4 The structural schematic diagram of the isolation plate in another direction of the utility model is provided for the utility model;

[0032] Figure 5 The structural schematic diagram of the thermal magnetic release structure installed on the base of the utility model is provided for the utility model;

[0033] Figure 6 The structural schematic diagram of the thermal magnetic release structure of the utility model is provided for the utility model.

[0034] The drawing mark explanation: 1, base;11, phase interval groove;12, rotating groove;13, limiting block;2, insulating baffle;20, step blocking part;3, isolation plate;30, embedded blocking part;31, isolation convex strip;32, first isolation boss;33, second isolation boss;34, first blocking part;35, second blocking part;4, rotating shaft;5, slot hole;51, limiting slot;6, traction rod;7, conductive plate;8, thermal magnetic release mechanism;81, magnetic yoke;82, movable armature;821, connecting part;822, attraction part;83, armature spring;84, thermal element;85, push rod part;86, rotating protrusion;87, lower hook;, positioning slot;88, upper hook;881, positioning hole. DETAILED DESCRIPTION

[0035] The technical solutions of the present application will be described clearly and completely in combination with the drawings. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0036] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0037] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0038] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict between them.

[0039] Embodiment

[0040] The present application provides a circuit breaker device with a thermal magnetic trip function as shown in Figures 1-6 The present application provides a circuit breaker device with a thermal magnetic trip function as shown in

[0041] The isolation plate 3 is inserted into the slot hole 5 through the limiting slot 51, and a rotating shaft 4 hole matched with the rotating shaft 4 is formed between the isolation plate 3 and the slot hole 5, both sides of the isolation plate 3 are respectively inserted into the two limiting slots 51, the isolation plate 3 is formed with an isolation protruding strip 31 extending and connected at the top of the insulating baffle 2, the first isolation boss 32 and the second isolation boss 33 distributed at both ends of the top of the isolation plate 3 are staggered arranged on the isolation protruding strip 31, the first isolation boss 32 and the second isolation boss 33 respectively extend towards both sides of the slot hole 5 and abut at the top of the insulating baffle 2, the top of the insulating baffle 2 is provided with a stepped blocking part 20 matched with the first isolation boss 32 and / or the second isolation boss 33, and the second isolation boss 33 and / or the first isolation boss 32 has a fitting blocking part 30 protruding downward and in contact with the inner wall of the slot hole 5.

[0042] In the above embodiment, the isolation plate 3 is arranged in the slot hole 5 of the insulating baffle 2, the both sides of the isolation plate 3 are closely inserted into the limiting slots 51 on both sides of the slot hole 5 to reduce the gap and effectively prevent the electric arc from passing between the isolation plate 3 and the slot hole 5, the first isolation boss 32 and the second boss distributed at both ends of the isolation plate 3 are staggered arranged on the isolation protruding strip 31 arranged at the top of the isolation plate 3, when the isolation plate 3 is inserted into the slot hole 5 to shield the position of the slot hole 5, the first isolation boss 32 and the second isolation boss 33 are respectively abutted at the top of the insulating baffle 2 on both sides of the slot hole 5, in order to further improve the insulation isolation effect, the stepped blocking part 20 matched with the first isolation boss 32 and / or the second isolation boss 33 can be arranged at the top of the insulating baffle 2, or the fitting blocking part 30 in contact with the inner wall of the slot hole 5 can be arranged on the second isolation boss 33 and / or the first isolation boss 32, the design makes the isolation plate, the slot hole and the insulating baffle form multiple isolation surfaces for blocking the electric arc, so as to isolate the installation gap and increase the creepage distance, the isolation plate 3 adopting the technical solution realizes the insulation isolation between the phases of the circuit breaker, ensures the safe electrical distance between the phases, avoids the phenomenon of creeping and arc jumping, and improves the electrical insulation performance of the product.

[0043] The following will be described in detail Figures 1-4 The specific arrangement of the isolation plate will be described in detail

[0044] The insulation baffle 2 comprises a first baffle part and a second baffle part arranged on both sides of the slot hole 5, the first isolation boss 32 and the isolation plate 3 are connected to form a first blocking part 34 matched with the first baffle part, the first blocking part 34 is located on one side of the isolation plate 3, and the first baffle part is provided with a stepped blocking part 20 matched with the first isolation boss 32; in addition, the second isolation boss 33 is provided with a fitting blocking part 30, the second isolation boss 33, the fitting blocking part 30 and the isolation plate 3 are connected to form a second blocking part 35 matched with the second baffle part, the second blocking part 35 is located on the other side of the isolation plate 3, and the structure is arranged to increase the creeping distance between the isolation plate 3 and the insulation baffle 2 through the first blocking part 34 and the second blocking part 35, and to shield the connection positions on both sides of the top of the isolation plate, so as to ensure the safe electrical gap between phases.

[0045] As shown in Figure 2 , the slot hole 5 is a U-shaped slot structure, the bottom of the isolation plate 3 is provided with a circular arc slot structure, so that the isolation plate 3 and the slot hole 5 are connected to form a shaft hole matched with the shaft 4, and further preferably, the first isolation boss 32 is formed on one side of the isolation convex strip 31, the second isolation boss 33 is formed on the other side of the isolation convex strip 31, the top of the isolation plate 3 is flush with the top of the insulation baffle 2, and the isolation convex strip 31 is higher than the first baffle part and the second baffle part, the left and right staggered second isolation boss 33 and the second isolation boss 33 respectively abut on the top of the first baffle part and the second baffle part, which can improve the insulation isolation effect of the isolation plate and the positioning and installation effect of the isolation plate.

[0046] In this embodiment, in combination with Figure 1 and Figures 5-6As shown, the circuit breaker device further comprises a plurality of thermal magnetic tripping mechanisms 8 arranged in the plurality of phase slots 11 respectively, the operating mechanism comprises a traction rod 6 rotatably arranged on the base 1 and cooperating with the thermal magnetic tripping mechanism 8, the traction rod 6 is used to trigger the operating mechanism of the circuit breaker to trip and cut off the circuit when driven by the thermal magnetic tripping mechanism 8, thereby realizing the tripping of the circuit breaker, the specific structure of the thermal magnetic tripping mechanism 8 will be described below: the thermal magnetic tripping mechanism comprises a magnetic yoke 81, a movable armature 82, a reset structure and a thermal element 84, the magnetic yoke 81 is fixedly connected with the conductive plate 7 in the phase slot 11; the movable armature 82 is rotatably connected to the two side walls of the phase slot 11 and oppositely arranged with the magnetic yoke 81, and the movable armature 82 is provided with a push rod part 85 for driving the traction rod 6 to act; the reset structure comprises at least one armature spring 83 arranged between the movable armature 82 and the magnetic yoke 81, the armature spring 83 applies an elastic force to the movable armature 82 to drive the driving part to rotate away from the traction rod 6; the thermal element 84 is fixedly connected to the conductive plate 7 and oppositely arranged with the traction rod 6. As can be seen from the above structure, the movable armature 82 of the thermal magnetic tripping mechanism 8 is rotatably connected to the two side walls of the phase slot, so that the rotatable connection of the movable armature does not need to rely on the traditional support to realize, and the support is omitted, thereby simplifying the installation structure, and the thermal magnetic tripping structure designed in this way has the advantages of simple structure, stable and reliable performance, convenient installation, sensitive tripping action, and realizes the short-circuit protection and overload protection functions of the circuit breaker.

[0047] As shown in Figure 6 The movable armature 82 is provided with two rotating protrusions 86 on both sides, and the two side walls of the phase slot 11 are provided with rotating grooves 12 cooperating with the two rotating protrusions 86, and the upper end of the rotating groove 12 is an open end, and the lower end is a circular arc end. This structure is arranged, and when installed, the two rotating protrusions 86 of the movable armature 82 are connected to the two rotating grooves 12 on the two side walls of the phase slot 11 respectively, and according to the design of the circular arc structure of the lower end of the rotating groove 12, it can be ensured that the rotating protrusion 86 can rotate flexibly in the rotating groove 12, thereby ensuring the sensitivity of the tripping action of the movable armature, and facilitating the assembly of the movable armature and the base, and the assembly efficiency is higher.

[0048] In order to facilitate the installation of the armature spring 83 between the movable armature 82 and the magnetic yoke 81, as shown in Figure 6As shown, the top of the moving armature 82 is bent to form two upper hooks 88 extending to one side of the magnetic yoke 81, the top of the magnetic yoke 81 is provided with two lower hooks 87 opposite to the two upper hooks 88, two armature springs 83 are arranged between the two lower hooks 87 and the two upper hooks 88, the lower hook 87 is provided with at least one positioning groove 871 for connecting one end of the armature spring 83, and the upper hook 88 is provided with two positioning holes 881 for connecting the other end of the armature spring 83, the mounting position of the armature spring 83 can be adjusted through the positioning hole 881, and the two ends of the armature spring 83 are respectively hooked in the positioning groove 871 and the positioning hole 881, so that the armature spring 83 is mounted and connected between the moving armature 82 and the magnetic yoke 81, the assembly is more convenient, and the armature spring is used to realize the resetting function of the moving armature after the tripping action is completed.

[0049] As a specific structure, the magnetic yoke 81 has a U-shaped magnetic yoke groove, the conductive plate 7 has an electric contact portion bent to extend through the magnetic yoke groove, the magnetic yoke 81 and the thermal element 84 are respectively fixed on the electric contact portion, the thermal element 84 is a bimetallic strip and has a free end extending upward out of the magnetic yoke groove and matched with the traction rod 6, the bimetallic strip is heated and bent when overload occurs, so as to drive the traction rod 6 to act to trigger the tripping of the circuit breaker under the overload condition, and the overload protection function is realized. Further preferably, a set of limiting blocks 13 opposite to the moving armature 82 are arranged in the interphase groove 11, the moving armature 82 includes a connecting portion 821 provided with a rotating protrusion 86 and an attraction portion 822 obliquely arranged below the connecting portion 821, the push rod portion 85 is vertically arranged on the top edge of the connecting portion 821, and the two upper hooks 88 are integrally formed on the top edge of the connecting portion 821, the attraction portion 822 is located between the magnetic yoke 81 and the set of limiting blocks 13 and abuts against the limiting blocks 13 under the action of the armature spring 83, the limiting blocks 13 limit the moving armature 82, when a large current short circuit fault occurs in the main circuit, the magnetic yoke 81 generates an attraction magnetic force to the east and west, and when the moving armature 82 rotates, the traction rod 6 is driven to rotate through the push rod portion 85, so as to trigger the tripping of the circuit breaker under the short circuit condition, and the short circuit protection function is realized.

[0050] Obviously, the above embodiments are only examples for clearly illustrating, but not limiting the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. All the embodiments do not need to be exhausted, and the obvious changes or variations still fall within the protection scope of the utility model.

Claims

1. A circuit breaker device having a thermal magnetic trip function, characterized by, The base (1) comprises a plurality of phase-to-phase grooves (11) and a plurality of insulation baffles (2) formed between the plurality of phase-to-phase grooves (11), and a plurality of slot holes (5) provided on the plurality of insulation baffles (2) for the rotating shaft (4) to pass through, and two limiting insertion grooves (51) are oppositely arranged on the inner walls on both sides of the slot hole (5). The isolation plate (3) is inserted into the slot hole (5) through the limiting insertion groove (51), and a rotating shaft (4) hole adapted to the rotating shaft (4) is formed between the isolation plate (3) and the slot hole (5), and an isolation protruding strip (31) is formed on the top of the isolation plate (3) and extends to connect the top of the insulation baffle (2), and a first isolation boss (32) and a second isolation boss (33) are arranged on the isolation protruding strip (31) in a staggered manner and are distributed on both ends of the top of the isolation plate (3), and the first isolation boss (32) and the second isolation boss (33) respectively extend towards both sides of the slot hole and abut against the top of the insulation baffle (2), and the top of the insulation baffle (2) is provided with a stepped blocking portion (20) matched with the first isolation boss (32) and / or the second isolation boss (33), and the second isolation boss (33) and / or the first isolation boss (32) has a downwardly protruding and fitting blocking portion (30) in contact with the inner wall of the slot hole (5).

2. The circuit breaker device with thermal magnetic tripping function according to claim 1, characterized in that: the insulation baffle (2) comprises a first baffle portion and a second baffle portion arranged separately on both sides of the slot hole (5), the first isolation boss (32) and the isolation plate (3) are connected to form a first blocking portion (34) matched with the first baffle portion, and the first blocking portion (34) is located on one side of the isolation plate (3). the second isolation boss (33), the fitting blocking portion (30) and the isolation plate (3) are connected to form a second blocking portion (35) matched with the second baffle portion, and the second blocking portion (35) is located on the other side of the isolation plate (3).

3. The circuit breaker device with thermal magnetic trip function according to claim 2, characterized in that:

4. The circuit breaker device with thermal magnetic tripping function according to claim 3, characterized in that: the first isolation boss (32) is formed on one side of the isolation protruding strip (31), the second isolation boss (33) is formed on the other side of the isolation protruding strip (31), the top of the isolation plate (3) is flush with the top of the insulation baffle (2), and the isolation protruding strip (31) is higher than the first baffle portion and the second baffle portion. the slot hole (5) is a U-shaped slot structure, and the bottom of the isolation plate (3) is provided with a circular arc slot structure.

5. The circuit breaker device with thermal magnetic trip function according to claim 4, characterized in that: Further comprising a plurality of thermal magnetic tripping mechanisms (8) arranged in the plurality of phase-to-phase grooves (11) respectively, the thermal magnetic tripping mechanism (8) comprises:

6. The circuit breaker device with a thermal magnetic trip function according to any one of claims 1-5, characterized in that: a magnetic yoke (81) connected with the conductive plate (7) and fixed in the phase-to-phase groove (11); a moving armature (82) rotatably connected to the side walls on both sides of the phase-to-phase groove (11) and oppositely arranged with the magnetic yoke (81), and the moving armature (82) is provided with a push rod portion (85) for driving the action of the traction rod (6). ​ A reset structure, comprising at least one armature spring (83) arranged between the movable armature (82) and the magnetic yoke (81), the armature spring (83) applying an elastic force to the movable armature (82) to drive the driving part to rotate away from the traction rod (6); A thermal element (84) fixedly connected to the conductive plate (7) and extending opposite to the traction rod (6).

7. The circuit breaker device with thermal magnetic trip function according to claim 6, characterized in that: The movable armature (82) is provided with two rotating protrusions (86) on both sides, and the side walls of the phase interval groove (11) are provided with rotating grooves (12) matched with the two rotating protrusions, the upper end of the rotating groove (12) is an open end, and the lower end is a circular arc end.

8. The circuit breaker device with thermal magnetic trip function according to claim 6, characterized in that: The top of the movable armature (82) is bent to form two upper hooks (88) extending to the side of the magnetic yoke (81), and the top of the magnetic yoke (81) is provided with two lower hooks (87) opposite to the two upper hooks (88), two armature springs (83) are arranged between the two lower hooks (87) and the two upper hooks (88), the lower hook (87) is provided with at least one positioning groove (871) for connecting one end of the armature spring (83), and the upper hook (88) is provided with at least one positioning hole (881) for connecting the other end of the armature spring (83).

9. The circuit breaker device with a thermal magnetic trip function according to claim 7 or 8, characterized in that: A set of limiting blocks (13) opposite to the movable armature (82) are arranged in the phase interval groove (11), the movable armature (82) comprises a connecting part (821) provided with the rotating protrusion (86) and an attraction part (822) arranged below the connecting part (821) and extending obliquely, and the push rod part (85) is arranged vertically on the connecting part (821), the attraction part (822) is located between the magnetic yoke (81) and the set of limiting blocks (13) and abuts against the limiting blocks (13) under the action of the armature spring (83).

10. The circuit breaker device with thermal magnetic trip function according to claim 9, characterized in that: The magnetic yoke (81) has a U-shaped magnetic yoke groove, the conductive plate (7) has an electric contact part extending through the magnetic yoke groove, and the magnetic yoke (81) and the thermal element (84) are fixed on the electric contact part, respectively.

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