Electromagnetic release and circuit breaker

Abstract

The electromagnetic release comprises a shell, a driving mechanism and an ejector rod, the driving mechanism comprises a magnet yoke, a coil assembly, an armature and a magnet, the magnet yoke and the coil assembly are matched to drive the armature to act in the shell, a protruding clamping part is arranged between a pair of spaced and opposite side walls in the shell, the shell is formed by splicing two sub-shells, and the ejector rod is arranged between the two sub-shells. Wherein one sub-shell comprises a bottom wall, the other sub-shell comprises a top wall, a pair of side walls provided with clamping parts are connected to one side of the bottom wall and one side of the top wall respectively, the driving mechanism is located on the bottom wall and limited by the clamping parts after the two sub-shells are assembled into the shell, and the ejector rod is assembled in a driving hole formed in the top wall. And the armature drives the ejector rod to slide in the driving hole. The shell is formed by splicing the two sub-shells, the driving mechanism is located on the bottom wall, the driving mechanism is limited in the shell through the clamping part after the two sub-shells are spliced into the shell, the driving mechanism is limited by the clamping part, and the shell has the advantages of being simple in structure, convenient to assemble and low in cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of low-voltage electric appliance, concretely relates to an electromagnetic release and circuit breaker. BACKGROUND

[0002] The circuit breaker is a low-voltage electric appliance with wide application, and the electromagnetic release is an important component of the circuit breaker with leakage protection function, when the leakage current appears in the main line connected to the circuit breaker, the electromagnetic release triggers the operating mechanism in the circuit breaker to release, and the existing electromagnetic release has the following defects: first, the driving mechanism such as the armature, coil framework and magnetic yoke in the electromagnetic release needs to be assembled in the shell through screws and other fasteners, and the assembly mode is complicated;Second, the magnets are mostly riveted, laser spot welded or glued, and the operation is complicated, which increases the assembly steps;Third, the impact of the armature will inevitably cause wear, which reduces the performance of the release and causes failure, and affects the service life and reliability of the product. SUMMARY

[0003] The utility model aims at overcoming at least one defect of prior art, and provides an electromagnetic release and circuit breaker.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] The utility model provides a kind of electromagnetic release, including shell, driving mechanism and top rod, the driving mechanism includes magnetic yoke, coil assembly, armature and magnet, the magnetic yoke is cooperated with coil assembly and drives armature to act in shell, a pair of spaced opposite side walls between the shell is equipped with the protruding clamping part, the shell is spliced by two split shells, one of split shells includes bottom wall, another split shell includes top wall, a pair of side walls with clamping part are connected to one side of bottom wall, top wall respectively, the driving mechanism is located on bottom wall and is limited by clamping part after two split shells are spliced into shell, the top rod is assembled in the driving hole opened in top wall, and the top rod is driven to slide in driving hole by armature.

[0006] Preferably, the clamping part includes limiting boss and / or positioning boss, limiting groove for limiting the edge of magnet or the edge of magnetic yoke is formed between the adjacent two limiting bosses in the same side wall, the protruding height of positioning boss in the same side wall is less than the protruding height of limiting boss, and the positioning boss is used to abut against and limit magnet or magnetic yoke.

[0007] Preferably, two limiting bosses on two side walls are spaced opposite, and notch groove is provided at the corner of each limiting boss, and the two side edges of armature are overlapped in notch groove.

[0008] Preferably, the driving mechanism further comprises a support, the magnetic yoke is fixed on the support and is limited together with the magnetic yoke, and the armature is slidingly supported on the support.

[0009] Preferably, one side wall adjacent to the bottom wall is provided with a reset connecting part, the reset connecting part corresponds to the bottom wall and the armature, and a reset part for resetting the armature is arranged between the armature and the reset connecting part.

[0010] Preferably, the bottom wall and the top wall are both rectangular plate bodies, one side of the bottom wall is connected with a first side wall, three adjacent side edges of the top wall are respectively connected with a side wall, one of the side walls is taken as a second side wall and is spaced apart from the first side wall, clamping parts are arranged on the first side wall and the second side wall, and the other two side walls are third side walls.

[0011] Preferably, the bottom wall and the top wall are both rectangular plate bodies, one side of the bottom wall is connected with a first side wall, three adjacent side edges of the top wall are respectively connected with a side wall, one of the side walls is taken as a second side wall and is spaced apart from the first side wall, clamping parts are arranged between the first side wall and the second side wall, and the other two side walls are third side walls, another side edge of the top wall extends to form an extension wall, the extension wall is spaced apart from the second side wall and is used for abutting the first side wall.

[0012] Preferably, the bottom wall is buckled with the second side wall and / or the third side wall.

[0013] Preferably, the third side wall and the top wall are provided with a sliding groove, or the third side wall and the extension part are provided with a sliding groove, and an edge of the first side wall is slidingly inserted into the sliding groove.

[0014] Preferably, a buffering assembly is further arranged in the shell, the buffering assembly is located between the driving mechanism and the top rod, and one side of the buffering assembly, which faces away from the top rod, is in limiting cooperation with the coil framework.

[0015] Preferably, the buffering assembly comprises a mounting plate and a buffering plate, the mounting plate is located in the shell and is between the driving mechanism and the top rod, an edge of the mounting plate is in limiting cooperation with the coil framework, the buffering plate is rotationally connected to the mounting plate, and the buffering plate is in transmission cooperation between the armature and the top rod.

[0016] Preferably, an edge of the mounting plate is provided with a clamping groove, an edge of the coil framework, which faces away from the magnet, is clamped into the clamping groove, and the edge of the mounting plate extends to form at least two pressing parts, one of the pressing parts is in abutment with the coil framework, and the other pressing part is in cooperation with an edge of the armature.

[0017] The utility model also provides a circuit breaker, including the shell, be provided with operating mechanism in the shell, still be provided with electromagnetic release as above in the shell, the top rod is cooperated with operating mechanism.

[0018] The electromagnetic release and the circuit breaker of the utility model, the casing is spliced by two split casings, the driving mechanism is located on the bottom wall, and is limited in the inside by the clamping part after the two split casings are assembled into the casing, the driving mechanism is limited by the clamping part, has the advantages of simple structure, convenient assembly and low cost.

[0019] In addition, the clamping part can be a limiting boss and / or a positioning boss, which has simple structure, low cost, and the advantages of simple assembly and stable limiting by limiting the edge of the magnet or the yoke edge, or limiting abutting with the magnet or the yoke.

[0020] In addition, the armature can be assembled on a pair of clamping parts, omitting the support, which is beneficial to reduce cost and simplify assembly.

[0021] In addition, the two split casings are connected by a buckle, which is convenient to assemble, and the edges of the two split casings are slidably inserted through the sliding groove, which is convenient to assemble and can ensure the sealing performance of the two split casings after splicing.

[0022] In addition, the impact force between the buffer rod and the armature is buffered by the buffer assembly, which avoids performance degradation and failure, and at the same time, the buffer assembly can cooperate with the limiting coil framework to further improve the assembly stability.

[0023] In particular, the mounting plate in the buffer assembly has the advantages of simple structure and convenient cooperation by setting the clamping groove and the pressing part. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 is a structural schematic view of the electromagnetic release in the utility model;

[0025] Figure 2 is a structural schematic view of the first split casing, the buffer assembly and the driving mechanism in the utility model;

[0026] Figure 3 is a structural schematic view of the driving mechanism and the buffer plate in the utility model;

[0027] Figure 4 is a structural schematic view of the driving mechanism in the utility model;

[0028] Figure 5 is a structural schematic view of the buffer assembly in the utility model;

[0029] Figure 6 is an exploded structural schematic view of the electromagnetic release in the utility model (first embodiment);

[0030] Figure 7 is an exploded structural schematic view of the casing in the utility model (first embodiment);

[0031] Figure 8 is a structural schematic view of the first sub-housing (first embodiment) in the utility model;

[0032] Figure 9 is a structural schematic view of the second sub-housing (first embodiment) in the utility model;

[0033] Figure 10 is a sectional view of the electromagnetic release (first embodiment) in the utility model;

[0034] Figure 11 is an exploded structural schematic view of the electromagnetic release (second embodiment) in the utility model;

[0035] Figure 12 is an exploded schematic view of the housing (second embodiment) in the utility model;

[0036] Figure 13 is a structural schematic view of the first sub-housing (second embodiment) in the utility model;

[0037] Figure 14 is a structural schematic view of the second sub-housing (second embodiment) in the utility model;

[0038] Figure 15 is a sectional view of the electromagnetic release (second embodiment) in the utility model;

[0039] Reference signs:

[0040] 1-housing, 101-first sub-housing, 102-second sub-housing, 11-top wall, 111-driving hole, 112-extended wall, 12-bottom wall, 121-buckle, 13-first side wall, 14-second side wall, 141-matching part, 15-third side wall, 151-slotted guide, 16-limiting boss, 17-positioning boss, 18-reset connecting part, 19-notched groove, 2-driving mechanism, 21-coil framework, 22-magnetic yoke, 23-iron core, 24-magnet, 25-resetting piece, 26-supporting piece, 3-buffer assembly, 31-mounting plate, 311-clamping groove, 312-pressing part, 32-buffer plate, 4-top rod. DETAILED DESCRIPTION

[0041] The following embodiments given in combination with the drawings further illustrate the specific implementation manners of the electromagnetic release and circuit breaker of the utility model. The electromagnetic release and circuit breaker of the utility model are not limited to the description of the following embodiments.

[0042] As Figures 1-5As shown, the electromagnetic tripping device comprises a housing 1, a driving hole 111 is formed on one side of the housing 1, a top rod 4 is slidingly assembled in the driving hole 111, a driving mechanism 2 is assembled in the housing 1, the driving mechanism 2 comprises a magnetic yoke 22, a coil assembly, an armature 23 and a magnet 24, the coil assembly comprises a coil framework 21 and a coil wound outside the coil framework 21, the armature 23 is rotatably assembled in the housing 1, the coil of the coil assembly is energized to cooperate with the magnetic yoke 22 to drive the armature 23 to act, the top rod 4 is driven by the armature 23 to slide in the driving hole 111, when the electromagnetic tripping device is arranged in a circuit breaker, the top rod 4 triggers the operating mechanism to trip, the magnet 24 is arranged side by side with the coil assembly, the armature 23 is attracted by the magnet 24, so that the armature 23 and the magnetic yoke 22 remain in the original state.

[0043] Generally, the driving mechanism 2 further comprises a support 26 and a reset member 25, wherein the support 26 is arranged in the housing 1, the magnetic yoke 22 can be fixedly connected with the support 26, the armature 23 is rotatably supported on the support 26, and the two ends of the reset member 25 are respectively connected with the armature 23 and the housing 1 for resetting the armature 23.

[0044] In addition, as shown in Figure 2 , 3 , 5, 6, 10, 11 and 15, a buffer assembly 3 is further arranged in the housing 1, the buffer assembly 3 is arranged between the driving mechanism 2 and the top rod 4, the buffer assembly 3 generally comprises a buffer plate 32, the buffer plate 32 is located between the armature 23 and the top rod 4, and the buffer plate 32 is drivingly connected between the armature 23 and the top rod 4, so as to buffer the impact between the top rod 4 and the armature 23, thereby avoiding the impact force between the top rod 4 and the armature 23.

[0045] As shown in Figure 8 , 9 , 13 and 14, the improvement of the present application lies in that a clamping portion is protrudingly arranged between a pair of spaced opposite side walls in the housing 1, the housing 1 is spliced by two split housings, one of the split housings comprises a bottom wall 12, the other split housing comprises a top wall 11, the pair of side walls provided with the clamping portion are respectively connected to one side of the bottom wall 12 and the top wall 11, the driving mechanism 2 is located on the bottom wall 12 and is limited by the clamping portion after the two split housings are spliced into the housing 1, and the top rod 4 is assembled in the driving hole 111 formed in the top wall 11.

[0046] In this way, the housing 1 is spliced by two split housings, the driving mechanism 2 is located on the bottom wall 12 and is limited in the interior by the clamping portion after the two split housings are spliced into the housing 1, the driving mechanism 2 is limited by the clamping portion, which has the advantages of simple structure, convenient assembly and low cost.

[0047] Specifically, the clamping portion includes the limiting boss 16 and / or the positioning boss 17, that is, in a pair of side walls, each of which can be provided with only the limiting boss 16 or the positioning boss 17, or one of which is provided with both the limiting boss 16 and the positioning boss 17, and the other of which is provided with only the limiting boss 16 or the positioning boss 17, or both of which are provided with the limiting boss 16 and the positioning boss 17; two adjacent limiting bosses 16 on the same side wall can form a limiting groove for limiting the edge of the magnet 24 or the edge of the yoke 22, when the limiting boss 16 and the positioning boss 17 are provided on the same side wall, the protruding height of the positioning boss 17 is less than that of the limiting boss 16, and the positioning boss 17 is used for limiting abutment with the magnet 24 or the yoke 22. The clamping portion has the advantages of simple structure and low cost by using the limiting boss 16 and / or the positioning boss 17, and simple assembly and stable limiting by limiting the edge of the magnet 24 or the edge of the yoke 22, or abutting with the magnet 24 and the yoke 22.

[0048] Further, the two limiting bosses 16 on the two side walls are spaced apart from each other, and each limiting boss 16 is provided with a notch groove 19 (see Figure 13 、 14 The two side edges of the armature 23 can be lapped into the notch groove 19, thereby providing an assembly position for the armature 23, so that the support 26 for supporting the armature 23 can be omitted, thereby reducing the cost and simplifying the assembly. In the embodiment, the two side edges of one end of the armature 23 are lapped into the notch groove 19, and the other end of the armature 23 is spaced apart from the coil assembly. When the coil assembly drives the armature 23, the armature 23 is slidingly fitted with the notch groove 19, so that the armature 23 moves towards or away from the coil assembly. Of course, the limiting boss 16 provided with the notch groove 19 can also be provided with more, and the electromagnetic release can still be provided with the support 26, wherein the armature 23 is slidingly supported on the support 26, so that the armature 23 is slidingly fitted with the support 26 during movement. At this time, the notch groove 19 is no longer provided on the limiting boss 16.

[0049] Further, the two split housings 1 are connected by buckling, which is convenient for assembly, and the edges of the two split housings are slidingly inserted through the sliding groove 151, which is convenient for assembly and can ensure the sealing and stable limiting of the two split housings after splicing.

[0050] In combination Figures 1-10 A first embodiment of an electromagnetic release is provided.

[0051] As Figure 1 、 8As shown in Figure -10, the electromagnetic trip unit includes a housing 1. In the figure, the housing 1 is a closed cuboid structure. A protruding locking part is provided between a pair of spaced-apart opposing sidewalls in the housing 1. In this embodiment, the housing 1 is composed of two sub-housings. One sub-housing includes a bottom wall 12, and the other sub-housing includes a top wall 11. The pair of sidewalls with locking parts are respectively connected to one side of the bottom wall 12 and the top wall 11. For ease of description, the sub-housing with the bottom wall 12 is the first sub-housing 101. The sidewall with locking parts in the first sub-housing 101 is the first sidewall 13. The sub-housing with the top wall 11 is the second sub-housing 102. The sidewall with locking parts in the second sub-housing 102 is the second sidewall 14. In this embodiment, the second sub-housing 102 is also connected to a pair of spaced-apart opposing third sidewalls 15. The second sidewall 14 is connected between the pair of third sidewalls 15.

[0052] The housing 1 is provided with a drive hole 111, and a push rod 4 is slidably assembled in the drive hole 111. In this embodiment, the drive hole 111 is opened in the middle of the top wall 11 (see Figure 6 , 7 (9) The housing 1 is provided with a drive mechanism 2 and a buffer assembly 3. The drive mechanism 2 and the buffer assembly 3 can be pre-assembled. The drive mechanism 2 is located on the bottom wall 12. When the first sub-housing 101 and the second sub-housing 102 are assembled into housing 1, the drive mechanism 2 can be limited by the clamping parts on the first side wall 13 and the second side wall 14.

[0053] Specifically, such as Figures 2-4 As shown in Figure 10, the drive mechanism 2 includes a magnetic yoke 22, a coil assembly, an armature 23, a magnet 24, and a support member 26. The magnetic yoke 22 is fixed to the bottom wall 12. The coil assembly includes a coil frame 21 and a coil wound around the outside of the coil frame 21. One end of the magnetic yoke 22 passes through the coil frame 21, and the other end of the magnetic yoke 22 is fixed to the support member 26 and spaced apart from the coil frame 21. The two ends of the magnetic yoke 22 serve as attractive parts 224, and the armature 23 is slidably mounted on the support member 26. Figure 2 , 10 In the coil, the armature 23 is arranged horizontally, and the armature 23 moves towards or away from the attraction part 224. When the coil is energized, the magnetic field generated by the attraction part 224 can drive the armature 23 to move within the housing 1. The magnet 24 is arranged side by side with the coil assembly. Typically, the magnet 24 is located between the other end of the coil frame 21 and the magnetic yoke 22. One end of the magnet 24 is used to reset the armature 23. That is, after the coil is de-energized, the magnet 24 attracts the armature 23, keeping the armature 23 in contact with the two attraction parts 224 of the magnetic yoke 22. Furthermore, a reset member 25 is connected to one end of the support member 26 and the armature 23. The reset member 25 is a spring. The reset member 25 stores energy when the coil is energized and releases energy after the coil is de-energized to reset the armature 23.

[0054] As Figure 2 、 9 and 10, the clamping part includes a limiting boss 16 and / or a positioning boss 17, the limiting groove for limiting the edge of the magnet 24 or the edge of the yoke 22 is formed between the adjacent two limiting bosses 16 on the same side wall, the protruding height of the positioning boss 17 on the same side wall is less than the protruding height of the limiting boss 16, the positioning boss 17 is used for abutting and limiting the magnet 24 or the yoke 22, in the embodiment, the first side wall 13 of the first sub-housing 101 is provided with the limiting boss 16, the limiting groove for limiting the edge of the yoke 22 is formed between the adjacent two limiting bosses 16, the second side wall 14 of the second sub-housing 102 is provided with the limiting boss 16 and the positioning boss 17 at the same time, the number of the limiting boss 16 is multiple, the limiting groove for limiting the edge of the yoke 22 is formed between at least two limiting bosses 16, in the embodiment, the one end of the yoke 22 arranged side by side with the coil former 21 and the support 26 are jointly limited in the same limiting groove, the other two limiting bosses 16 form another limiting groove for limiting the edge of the magnet 24, further, when the limiting grooves for limiting the yoke 22 and the magnet 24 are adjacent, the same limiting boss 16 can be shared; the positioning boss 17 is located in the limiting groove, and the protruding height of the positioning boss 17 is less than the protruding height of the limiting boss 16, the positioning boss 17 in one limiting groove is used for abutting and limiting the yoke 22, and the positioning boss 17 in the other limiting groove is used for abutting and limiting the magnet 24.

[0055] Preferably, the two sub-housings are connected by buckling, that is, in the embodiment, the bottom wall 12 is buckled with the second side wall 14 and / or the third side wall 15, which facilitates the disassembly and assembly of the two sub-housings 1; further, the edge of one of the sub-housings is provided with a sliding groove 151 (see Figure 7 ), and the edge of the other sub-housing is slidingly inserted into the sliding groove 151, so as to ensure the edge sealing performance and cooperation stability of the two sub-housings 1.

[0056] In combination with Figure 2 、 6-8 provides a first sub-housing 101 structure applied to the embodiment, the first sub-housing 101 includes a bottom wall 12 of a rectangular plate body, a first side wall 13 is arranged at one side edge of the bottom wall 12, the first side wall 13 is approximately a rectangular plate body structure, so that the first sub-housing 101 as a whole is an L-shaped structure, the edge thickness of the first side wall 13 is preferably thinned, facilitating the sliding insertion with the sliding groove 151 on the second sub-housing 102, avoiding that the sliding groove 151 occupies a larger space, a side surface of the first side wall 13 facing the bottom wall 12 is protrusively provided with three limiting bosses 16, the center axes of two limiting bosses 16 are located on the same straight line, and the other limiting boss 16 is arranged at one side of the two limiting bosses 16, so as to form a limiting groove on the first side wall 13, when the driving assembly is arranged on the bottom wall 12, the edge of the magnetic yoke 22 and the support 26 are jointly limited in the limiting groove, Figure 9 In the embodiment, the two limiting bosses 16 are rectangular bosses, and the other limiting boss 16 is irregularly shaped, each limiting boss 16 can have a fillet or a bevel; an edge is arranged at the edge of the bottom wall 12, the edge and the first side wall 13 are located on the same surface of the bottom wall 12, the buckle 121 structure is arranged on the edge, preferably, the buckle 121 is located on the edge of the bottom wall 12 away from the first side wall 13.

[0057] In combination Figure 2 , 9 and 10 provides a second sub-housing 102 structure applied to the embodiment, the second sub-housing 102 includes a top wall 11 of a rectangular plate body, three adjacent side edges of the top wall 11 are respectively connected with a side wall, one pair of opposite and spaced side walls are third side walls 15, and the remaining one side wall is a second side wall 14, another side edge of the top wall 11 extends to form an extension wall 112, the extension wall 112 is opposite to the second side wall 14, and the distance from the edge of the extension wall 112 to the top wall 11 is less than the interval from the edge of the second side wall 14 to the top wall 11; a plurality of limiting bosses 16 and a plurality of positioning bosses 17 are arranged at the middle part of the second side wall 14, and the limiting bosses 16 are arranged in pairs and spaced, preferably, two pairs of limiting bosses 16 are used to limit the edge of the magnet 24, and the other two pairs of limiting bosses 16 are used to limit the edge of the magnetic yoke 22, Figure 9In the embodiment, three limiting bosses 16 are arranged at the middle part of the second side wall 14, and a limiting groove for limiting one end of the magnet 24 is formed between the left limiting boss 16 and the middle limiting boss 16, and another limiting groove for limiting the yoke 22 and the support 26 is formed between the middle limiting boss 16 and the right limiting boss 16. Correspondingly, three limiting bosses 16 are also arranged at the area of the second side wall 14 away from the top wall 11, and a limiting groove for limiting the other end of the magnet 24 is formed between the left limiting boss 16 and the middle limiting boss 16. One or two positioning bosses 17 are arranged in each limiting groove, and the protruding height of the positioning boss 17 is less than the protruding height of the adjacent limiting boss 16. When the magnet 24 or the yoke 22 is arranged in the limiting groove, the positioning boss 17 abuts against the magnet 24 or the yoke 22.

[0058] When the first sub-shell 101 and the second sub-shell 102 are assembled into the shell 1, the first side wall 13 is butted against the extension wall 112, and the limiting bosses 16 and the positioning bosses 17 on the first side wall 13 and the second side wall 14 jointly form a clamping part for limiting the driving mechanism 2. The movement of the magnet 24 or the yoke 22 in the direction parallel to the first side wall 13 or the second side wall 14 is limited by the limiting groove, and the magnet 24 or the yoke 22 is clamped by the positioning boss 17. It should be noted that the specific shape of the limiting boss 16 and the positioning boss 17 in the embodiment is not limited, as long as the clamping and positioning functions can be realized.

[0059] In the embodiment, the side of the second side wall 14 away from the top wall 11 is provided with a matching part 141, which is a boss structure, and the protruding direction of the matching part 141 is consistent with the protruding direction of the limiting boss 16 and the positioning boss 17. The buckle 121 arranged on the first side wall 13 is buckled with the matching part 141, which facilitates the disassembly and assembly of the first sub-shell 101 and the second sub-shell 102. In addition, the two third side walls 15 and the extension wall 112 are provided with sliding grooves 151. On the third side wall 15, the sliding groove 151 is located at the edge position away from the second side wall 14, and on the extension wall 112, the sliding groove 151 is located at the edge position of the extension wall 112. When the first sub-shell 101 and the second sub-shell 102 are assembled, the edge of the first side wall 13 slides and inserts along the sliding groove 151. After the assembly is completed, the first side wall 13 is limited and inserted with the sliding groove 151, which is beneficial to ensuring the sealing and stability of the butt joint of the shell 1.

[0060] In addition, in the embodiment, the driving mechanism 2 and the top rod 4 are further provided with a buffer assembly 3. The side of the buffer assembly 3 away from the top rod 4 can be limited and matched with the coil framework 21, thereby facilitating the limiting of the driving mechanism 2.

[0061] As Figure 2 , 5As shown in 5 and 10, the buffer assembly 3 comprises mounting plates 31 and a buffer plate 32, the mounting plates 31 are two in number and are arranged in the housing 1 between the driving mechanism 2 and the top rod 4, the edges of the mounting plates 31 can abut against the coil frame 21, of course, the edges of the mounting plates 31 can be provided with clamping grooves 311 and pressing portions 312, wherein the edges of the coil frame 21 can be clamped in the clamping grooves 311, one of the pressing portions 312 abuts against the limiting plate 2111 of the coil frame 21, and the other pressing portion 312 cooperates with the two side edges of the armature 23 to limit.

[0062] As shown in 5 and 10, the buffer assembly 3 comprises mounting plates 31 and a buffer plate 32, the mounting plates 31 are two in number and are arranged in the housing 1 between the driving mechanism 2 and the top rod 4, the edges of the mounting plates 31 can abut against the coil frame 21, of course, the edges of the mounting plates 31 can be provided with clamping grooves 311 and pressing portions 312, wherein the edges of the coil frame 21 can be clamped in the clamping grooves 311, one of the pressing portions 312 abuts against the limiting plate 2111 of the coil frame 21, and the other pressing portion 312 cooperates with the two side edges of the armature 23 to limit. Figure 2 、 5 As shown in 5 and 10, the buffer assembly 3 comprises mounting plates 31 and a buffer plate 32, the mounting plates 31 are two in number and are arranged in the housing 1 between the driving mechanism 2 and the top rod 4, the edges of the mounting plates 31 can abut against the coil frame 21, of course, the edges of the mounting plates 31 can be provided with clamping grooves 311 and pressing portions 312, wherein the edges of the coil frame 21 can be clamped in the clamping grooves 311, one of the pressing portions 312 abuts against the limiting plate 2111 of the coil frame 21, and the other pressing portion 312 cooperates with the two side edges of the armature 23 to limit.

[0063] As shown in 5 and 10, the buffer assembly 3 comprises mounting plates 31 and a buffer plate 32, the mounting plates 31 are two in number and are arranged in the housing 1 between the driving mechanism 2 and the top rod 4, the edges of the mounting plates 31 can abut against the coil frame 21, of course, the edges of the mounting plates 31 can be provided with clamping grooves 311 and pressing portions 312, wherein the edges of the coil frame 21 can be clamped in the clamping grooves 311, one of the pressing portions 312 abuts against the limiting plate 2111 of the coil frame 21, and the other pressing portion 312 cooperates with the two side edges of the armature 23 to limit. Figure 2 、 3 As shown in 5 and 10, the buffer assembly 3 comprises mounting plates 31 and a buffer plate 32, the mounting plates 31 are two in number and are arranged in the housing 1 between the driving mechanism 2 and the top rod 4, the edges of the mounting plates 31 can abut against the coil frame 21, of course, the edges of the mounting plates 31 can be provided with clamping grooves 311 and pressing portions 312, wherein the edges of the coil frame 21 can be clamped in the clamping grooves 311, one of the pressing portions 312 abuts against the limiting plate 2111 of the coil frame 21, and the other pressing portion 312 cooperates with the two side edges of the armature 23 to limit. Figure 10 As shown in 5 and 10, the buffer assembly 3 comprises mounting plates 31 and a buffer plate 32, the mounting plates 31 are two in number and are arranged in the housing 1 between the driving mechanism 2 and the top rod 4, the edges of the mounting plates 31 can abut against the coil frame 21, of course, the edges of the mounting plates 31 can be provided with clamping grooves 311 and pressing portions 312, wherein the edges of the coil frame 21 can be clamped in the clamping grooves 311, one of the pressing portions 312 abuts against the limiting plate 2111 of the coil frame 21, and the other pressing portion 312 cooperates with the two side edges of the armature 23 to limit.

[0064] As shown in 5 and 10, the buffer assembly 3 comprises mounting plates 31 and a buffer plate 32, the mounting plates 31 are two in number and are arranged in the housing 1 between the driving mechanism 2 and the top rod 4, the edges of the mounting plates 31 can abut against the coil frame 21, of course, the edges of the mounting plates 31 can be provided with clamping grooves 311 and pressing portions 312, wherein the edges of the coil frame 21 can be clamped in the clamping grooves 311, one of the pressing portions 312 abuts against the limiting plate 2111 of the coil frame 21, and the other pressing portion 312 cooperates with the two side edges of the armature 23 to limit. Figures 1-5 As shown in 5 and 10, the buffer assembly 3 comprises mounting plates 31 and a buffer plate 32, the mounting plates 31 are two in number and are arranged in the housing 1 between the driving mechanism 2 and the top rod 4, the edges of the mounting plates 31 can abut against the coil frame 21, of course, the edges of the mounting plates 31 can be provided with clamping grooves 311 and pressing portions 312, wherein the edges of the coil frame 21 can be clamped in the clamping grooves 311, one of the pressing portions 312 abuts against the limiting plate 2111 of the coil frame 21, and the other pressing portion 312 cooperates with the two side edges of the armature 23 to limit.

[0065] As shown in 5 and 10, the buffer assembly 3 comprises mounting plates 31 and a buffer plate 32, the mounting plates 31 are two in number and are arranged in the housing 1 between the driving mechanism 2 and the top rod 4, the edges of the mounting plates 31 can abut against the coil frame 21, of course, the edges of the mounting plates 31 can be provided with clamping grooves 311 and pressing portions 312, wherein the edges of the coil frame 21 can be clamped in the clamping grooves 311, one of the pressing portions 312 abuts against the limiting plate 2111 of the coil frame 21, and the other pressing portion 312 cooperates with the two side edges of the armature 23 to limit. Figure 1 、 13As shown in Figure -15, the electromagnetic trip device includes a closed, rectangular housing 1. Similar to the first embodiment, a protruding locking part is provided between a pair of side walls of the housing 1. The housing 1 is also composed of two sub-housings. One sub-housing includes a bottom wall 12, and the other sub-housing includes a top wall 11. The pair of side walls with locking parts are respectively connected to one side of the bottom wall 12 and the top wall 11. The sub-housing with the bottom wall 12 is the first sub-housing 101. The side wall with locking parts in the first sub-housing 101 is the first side wall 13. The sub-housing with the top wall 11 is the second sub-housing 102. The side wall with locking parts in the second sub-housing 102 is the second side wall 14. The top wall 11 is connected to a pair of third side walls 15, and the second side wall 14 is connected between the pair of third side walls 15.

[0066] Similar to the first embodiment, the top wall 11 has a drive hole 111 in the middle and a top rod 4 is provided. The housing 1 is equipped with a drive mechanism 2 and a buffer assembly 3. The drive assembly and the buffer assembly 3 can be assembled in advance. The drive mechanism 2 is located on the bottom wall 12. After the two sub-housing housings 1 are assembled into a complete housing 1, the drive mechanism 2 is limited by the clamping parts of the first side wall 13 and the second side wall 14.

[0067] Compared to the first embodiment, this embodiment makes further simplified settings, such as... Figures 12-14 As shown, the second sub-shell 102 no longer has an extension wall 112. The sliding groove 151 is provided on the third side wall 15 and the top wall 11. That is, the sliding groove 151 is provided on the edge of the third side wall 15 and the top wall 11 away from the second side wall 14. When the first sub-shell 101 and the second sub-shell 102 are assembled, the edge of the first side wall 13 slides and inserts along the sliding groove 151. After the assembly is completed, the limiting insertion of the first side wall 13 and the sliding groove 151 helps to ensure the sealing and stability of the docking point of the shell 1.

[0068] Furthermore, such as Figures 13-15 As shown, the drive mechanism 2 located inside the housing 1 omits the support member 26. The housing 1 limits the armature 23 and the reset member 25. The limiting boss 16 on the first side wall 13 and the second side wall 14 forms a limiting groove, which is only used to limit the magnetic yoke 22. In this embodiment, the two sub-housing housings 1 are supplemented with at least one pair of limiting bosses 16 to limit the armature 23 based on the first embodiment. That is, in addition to the limiting bosses 16 and positioning bosses 17 with the same number and position as in the first embodiment, the first side wall 13 and the second side wall 14 are provided with two additional limiting bosses 16. The two limiting bosses 16 are spaced apart and opposite each other. Each limiting boss 16 has a notch 19 at its corner. The two sides of the armature 23 overlap in the notch 19. When the armature 23 is driven, the edge of the armature 23 slides in the notch 19. In this way, the armature 23 is also limited by the clamping part, which helps to reduce costs and simplify the assembly process.

[0069] As Figure 2 、 14 and 15, a reset connecting part 18 is arranged in the shell 1, the reset connecting part 18 is arranged on one side wall adjacent to the bottom wall 12, and the reset connecting part 18 corresponds to the position between the armature 23 and the bottom wall 12, in the embodiment, the reset connecting part 18 is a round shaft-shaped boss arranged on the second side wall 14, one end of the reset part 25 is connected to the armature 23, and the other end is connected to the reset connecting part 18, of course, the reset connecting part 18 can also be arranged on the first side wall 13.

[0070] The circuit breaker comprises a shell, at least one circuit breaker pole is arranged in the shell, an operating mechanism is arranged in at least one circuit breaker pole, all contact mechanisms in the circuit breaker poles are driven by the operating mechanism to perform opening and closing actions, the circuit breaker pole, the operating mechanism and the contact mechanism can adopt the prior art, and the electromagnetic release in the above embodiment is further arranged in the shell, the top rod 4 of the electromagnetic release is used for triggering the operating mechanism to release, when the driving mechanism 2 in the electromagnetic release acts, the top rod 4 extends from the driving hole 111 to trigger the operating mechanism to release, so that the contact mechanism of the circuit breaker is opened and power is cut off.

[0071] It should be noted that in the description of the utility model, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings or the orientation or positional relationship commonly used in use, and are only for the convenience of description, and do not indicate that the device or element referred to must have a particular orientation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" and the like are only used for distinguishing description, and cannot be understood as indicating relative importance.

[0072] The above content is a further detailed description of the utility model in combination with specific preferred embodiments, and the specific implementation of the utility model cannot be limited to these descriptions. For ordinary skilled persons in the technical field to which the utility model belongs, under the premise of not departing from the concept of the utility model, a number of simple deductions or substitutions can be made, and all should be regarded as belonging to the protection scope of the utility model.

Claims

1. An electromagnetic trip unit comprising a housing (1), a drive mechanism (2) and a trip bar (4), said drive mechanism (2) comprising a yoke (22), a coil assembly, an armature (23) and a magnet (24), said yoke (22) cooperating with the coil assembly to drive the armature (23) to act within the housing (1), characterised in that: The housing (1) is provided with protruding clamping portions between a pair of spaced opposite side walls, the housing (1) is assembled by two sub-housings, one of the sub-housings comprises a bottom wall (12), the other sub-housing comprises a top wall (11), the pair of side walls provided with the clamping portions are connected to one side of the bottom wall (12) and the top wall (11) respectively, the driving mechanism (2) is located on the bottom wall (12) and is limited by the clamping portions after the two sub-housings are assembled into the housing (1), the top rod (4) is assembled in the driving hole (111) opened in the top wall (11), the armature (23) drives the top rod (4) to slide in the driving hole (111).

2. The electromagnetic trip unit of claim 1, wherein: The clamping portion comprises a limiting boss (16) and / or a positioning boss (17), two limiting bosses (16) located on the same side wall form a limiting groove for limiting the edge of the magnet (24) or the edge of the magnetic yoke (22) between the two limiting bosses (16), the protruding height of the positioning boss (17) located on the same side wall is less than the protruding height of the limiting boss (16), and the positioning boss (17) is used for abutting and limiting the magnet (24) or the magnetic yoke (22).

3. The electromagnetic trip unit of claim 2, wherein: The two limiting bosses (16) located on the two side walls are spaced opposite to each other, and each limiting boss (16) is provided with a notch groove (19) at a corner thereof, and the two side edges of the armature (23) are overlapped in the notch groove (19).

4. The electromagnetic trip unit of claim 2, wherein: The driving mechanism (2) further comprises a support member (26), the magnetic yoke (22) is fixed on the support member (26) and is commonly limited with the magnetic yoke (22), and the armature (23) is slidingly supported on the support member (26).

5. The electromagnetic trip unit of claim 1, wherein: One side wall adjacent to the bottom wall (12) is provided with a reset connecting portion (18), the reset connecting portion (18) corresponds to the bottom wall (12) and the armature (23), and a reset member (25) for resetting the armature (23) is arranged between the armature (23) and the reset connecting portion (18).

6. The electromagnetic trip unit of claim 1, wherein: The bottom wall (12) and the top wall (11) are both rectangular plates, one side of the bottom wall (12) is connected with a first side wall (13), three adjacent side edges of the top wall (11) are respectively connected with a side wall, one of the side walls is taken as a second side wall (14) and is spaced opposite to the first side wall (13), and the clamping portions are arranged on the first side wall (13) and the second side wall (14), and the other two side walls are third side walls (15).

7. The electromagnetic trip unit of claim 1, wherein: The bottom wall (12) and the top wall (11) are both rectangular plates, one side of the bottom wall (12) is connected with a first side wall (13), three adjacent side edges of the top wall (11) are respectively connected with a side wall, one of the side walls is taken as a second side wall (14) and is spaced opposite to the first side wall (13), the clamping portions are arranged between the first side wall (13) and the second side wall (14), the other two side walls are third side walls (15), and the other side edge of the top wall (11) extends to form an extension wall (112), the extension wall (112) is spaced opposite to the second side wall (14) and is used for abutting the first side wall (13).

8. Electromagnetic trip according to claim 6 or 7, characterized in that: The bottom wall (12) is snap-connected with the second side wall (14) and / or the third side wall (15).

9. The electromagnetic trip unit of claim 6 or 7, wherein: The third side wall (15) and the top wall (11) are provided with a sliding groove (151), or the third side wall (15) and the extension are provided with a sliding groove (151), and the edge of the first side wall (13) is slidingly inserted into the sliding groove (151).

10. The electromagnetic trip unit of claim 1, wherein: The shell (1) is further provided with a buffer assembly (3), which is located between the driving mechanism (2) and the ejector rod (4), and the side, away from the ejector rod (4), of the buffer assembly (3) is in position-limiting cooperation with the coil former (21).

11. The electromagnetic trip unit of claim 10, wherein: The buffer assembly (3) comprises a mounting plate (31) and a buffer plate (32), the mounting plate (31) is located in the shell (1) between the driving mechanism (2) and the ejector rod (4), the edge of the mounting plate (31) is in position-limiting cooperation with the coil former (21), the buffer plate (32) is rotationally connected to the mounting plate (31), and the buffer plate (32) is drivingly connected between the armature (23) and the ejector rod (4).

12. The electromagnetic trip unit of claim 11, wherein: The edge of the mounting plate (31) is provided with a clamping groove (311), the side, away from the magnet (24), of the coil former (21) is clamped into the clamping groove (311), and the edge of the mounting plate (31) is extended to form at least two pressing portions (312), one of which is in abutment with the coil former (21), and the other is in cooperation with the edge of the armature (23).

13. A circuit breaker comprising a housing in which is disposed an operating mechanism, characterised in that: The shell is further provided with the electromagnetic release according to any one of claims 1-12, and the ejector rod (4) is in cooperation with the operating mechanism.

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