Electromagnetic release and circuit breaker

Abstract

The electromagnetic tripper comprises a current-conducting plate, a magnet yoke, an armature and a support, the current-conducting plate penetrates through a gap between the magnet yoke and the armature, and the two ends of the magnet yoke are bent along the edges of the two sides of the current-conducting plate respectively and extend in the direction close to the armature, so that the magnet yoke and the armature are matched to surround the outer side of the current-conducting plate. The magnet yoke and the armature are matched on one side of the current-conducting plate to form a magnetic gap, the armature is connected with a pull rod, the pull rod and / or the armature are / is in linear sliding fit with the support, and the armature moves linearly relative to the current-conducting plate. According to the utility model, the armature moves linearly relative to the current-conducting plate, and the moving track of the armature is limited by the linear sliding fit of the pull rod and / or the armature and the bracket, so that the whole structure is smaller than that of a solenoid type electromagnetic release, the space required by the linear moving track is smaller, and the miniaturization design requirement of the circuit breaker can be met.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical appliances, in particular to an electromagnetic release and a circuit breaker. Background Art

[0002] Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their scope of use. Low-voltage circuit breakers are electrical appliances that have both manual switch functions and can automatically provide protection against loss of voltage, undervoltage, overload and / or short circuit. They can be used to distribute electrical energy, start asynchronous motors infrequently, and protect power lines and motors. They can automatically cut off the circuit when a serious overload, short circuit, undervoltage or other fault occurs.

[0003] In existing products, a short-circuit protection mechanism, also called an electromagnetic release, is usually configured inside. When the current passing through the circuit breaker increases to a certain value, the electromagnetic release causes the circuit breaker to trip quickly, thereby achieving the function of circuit protection. Existing electromagnetic releases are usually snap-on electromagnetic releases or solenoid electromagnetic releases. Among them, the snap-on action of the snap-on electromagnetic release occupies more space, and the overall volume of the solenoid of the solenoid electromagnetic release is relatively large, so that the electromagnetic release needs to occupy more space in the circuit breaker, which is not conducive to the miniaturization design of the circuit breaker. Summary of the invention

[0004] The utility model aims to overcome at least one defect of the prior art and provide an electromagnetic release and a circuit breaker.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides an electromagnetic release, comprising a conductive plate, a yoke, an armature and a bracket, wherein the conductive plate passes through the gap between the yoke and the armature, and the two ends of the yoke are respectively bent along the two side edges of the conductive plate and extend in the direction close to the armature, so that the yoke and the armature cooperate to surround the outer side of the conductive plate, and the yoke and the armature cooperate to form a magnetic gap on one side of the conductive plate, a pull rod is connected to the armature, and the pull rod and / or the armature are linearly slidably matched with the bracket, and the armature moves linearly relative to the conductive plate.

[0007] Preferably, the yoke and the armature are both U-shaped frame structures, and the opening of the yoke and the opening of the armature are spaced relative to each other to form a magnetic gap.

[0008] Preferably, the side walls on both sides of the opening of the yoke are respectively the first attraction walls, and the side walls on both sides of the opening of the armature are respectively the second attraction walls, the edges of the first attraction wall and the second attraction wall form the first attraction surface and the second attraction surface respectively, and a magnetic gap is left between the first attraction surface and the second attraction surface.

[0009] Preferably, the first attraction surface and the second attraction surface are inclined surfaces with the same inclination, the first attraction surface is located at an edge of a side of the first attraction wall away from the conductive plate, and the second attraction surface is located at an edge of a side of the armature close to the conductive plate.

[0010] Preferably, the bracket is parallel to and opposite to the conductive plate, a moving space is reserved between the bracket and the conductive plate, and the armature and the pull rod move in the moving space.

[0011] Preferably, a sliding structure that cooperates with each other is provided between the bracket and the pull rod, and the sliding structure includes a sliding portion and a sliding groove that cooperate with each other, the sliding portion is protrudingly provided on the bracket or the pull rod, and the sliding groove is opened on the pull rod or the bracket.

[0012] Preferably, a first reset member is connected to a side of the armature facing away from the pull rod, and a second reset member is connected to the pull rod.

[0013] Preferably, the pull rod includes a main body, which is a plate-shaped structure with unequal widths at both ends, and the width of the main body gradually decreases. The end of the main body with a larger width is fixedly connected to the armature, and the end of the main body with a smaller width is provided with a through hole serving as a tripping drive part. A slide groove is provided in the middle of the main body, and a second groove is provided on the main body on at least one side of the slide groove.

[0014] Preferably, one end of the conductive plate is folded back on a side facing away from the armature to form a stationary contact plate, so that a gap for accommodating the magnetic yoke is formed between the stationary contact plate and the middle part of the conductive plate.

[0015] The utility model also provides a circuit breaker, comprising a shell, wherein an operating mechanism, a traction rod and at least one circuit breaker pole are arranged in the shell, wherein the traction rod is rotatably arranged on one side of the operating mechanism, each circuit breaker pole comprises a contact mechanism, wherein the contact mechanism comprises a moving contact and a static contact which cooperate with each other, and the operating mechanism is connected to the moving contact of at least one circuit breaker pole, and is characterized in that: an electromagnetic release as described above is also arranged in each circuit breaker pole, and the pull rod cooperates with the traction rod to trigger the operating mechanism to trip.

[0016] Furthermore, the housing includes a base and an upper cover covering the base, the electromagnetic release is arranged between the upper cover and the base, and one end of the conductive plate extends through the base to a side of the base facing away from the upper cover for connection with the static contact.

[0017] Furthermore, a stationary contact plate is formed at one end of the conductive plate, and a stationary contact point is provided on one side of the stationary contact plate facing away from the magnetic yoke to form a stationary contact that cooperates with the moving contact.

[0018] Furthermore, one end of the pull rod away from the armature is provided with a through hole serving as a release drive unit, and the traction rod is provided with at least one push rod, which is connected to the release drive unit.

[0019] Furthermore, at least one pair of positioning parts is arranged inside the circuit breaker pole, and a gap is left between each pair of positioning parts for the pull rod to move.

[0020] In the electromagnetic release and circuit breaker of the utility model, the armature moves linearly relative to the conductive plate, and the movement trajectory of the armature is limited by the linear sliding cooperation between the pull rod and / or the armature and the bracket. The overall structure is smaller than that of the solenoid type electromagnetic release, and the movement trajectory is linear, which requires less space, which is conducive to meeting the miniaturized design requirements of the circuit breaker.

[0021] In addition, the bracket is parallel to the conductive plate and a moving space is reserved between the bracket and the conductive plate for the armature and the pull rod to move, so as to prevent the armature and the pull rod from being disturbed by the outside during the movement.

[0022] In addition, the yoke and the armature are both U-shaped frame structures, which facilitates the two to cooperate and surround the outer side of the conductive plate, and it has the advantages of simple structure, low cost and small space occupation.

[0023] In particular, the first attraction surface of the yoke and the second attraction surface of the armature are both inclined surfaces with the same inclination and have a longer matching surface, which is conducive to ensuring the stability of the attraction. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an exploded view of the electromagnetic release, the base and the upper cover in the utility model;

[0025] Figure 2 It is a structural schematic diagram of the base in the utility model;

[0026] Figure 3 It is a structural schematic diagram of the electromagnetic release in the utility model;

[0027] Figure 4 It is a structural schematic diagram of the magnetic yoke in the utility model;

[0028] Figure 5 It is a structural schematic diagram of the armature in the utility model;

[0029] Figure 6 It is a structural schematic diagram of the pull rod in the utility model;

[0030] Figure 7 It is the front view of the pull rod in the utility model;

[0031] Figure 8 It is a structural schematic diagram of the push rod in the utility model;

[0032] Reference numerals:

[0033] 1-conductive plate, 2-yoke, 21-first suction wall, 211-first suction surface, 3-armature, 31-second suction wall, 311-second suction surface, 4-bracket, 5-pull rod, 50-main body, 51-slide groove, 52-tripping drive part, 61-first reset member, 62-second reset member, 71-stationary contact plate, 72-stationary contact, 8-traction rod, 81-push rod, 811-trigger part, 91-upper cover, 92-base, 921-positioning part, a1-second fixing part, a2-second groove. DETAILED DESCRIPTION

[0034] The following embodiments are combined with the accompanying drawings to further illustrate the specific implementation 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.

[0035] The circuit breaker includes a shell, in which an operating mechanism and at least one circuit breaker pole are arranged. Each circuit breaker pole includes a pair of wiring terminals and a contact mechanism connected between the pair of wiring terminals. The contact mechanism includes a moving contact and a static contact that cooperate with each other. The operating mechanism is directly or indirectly connected to the moving contact of each circuit breaker pole, and the closing or opening of the circuit breaker is achieved by driving the moving contact to contact or separate from the static contact.

[0036] like Figure 1 As shown, the operating mechanism includes a trip buckle, a lock buckle and a re-buckle which are respectively rotatably arranged. The trip buckle cooperates with the lock buckle, and the lock buckle cooperates with the re-buckle limit. A traction rod 8 is also arranged on one side of the operating mechanism. An electromagnetic release is also arranged in each circuit breaker pole. When a short circuit fault occurs, the electromagnetic release drives the traction rod 8 to trigger the re-buckle to reset, the lock buckle rotates and releases the buckle cooperation with the trip buckle, the operating mechanism trips and drives the moving contact to separate from the static contact, thereby tripping and cutting off the power to achieve short circuit protection.

[0037] Typically, an electromagnetic release comprises a conductive plate 1, a yoke 2, an armature 3 and a bracket 4, wherein the conductive plate 1 passes through the gap between the yoke 2 and the armature 3, and the two ends of the yoke 2 are respectively bent along the two side edges of the conductive plate 1 and extend toward the direction close to the armature 3, so that the yoke 2 and the armature 3 form a structure surrounding the outside of the conductive plate 1, and the yoke 2 and the armature 3 cooperate to form a magnetic gap on one side of the conductive plate 1, and one end of the armature 3 can be rotatably connected to the bracket 4. When a large current passes through the conductive plate 1, the armature 3 is driven to move toward the direction close to the yoke 2; in addition, a pull rod 5 is also connected to the armature 3, and the pull rod 5 drives the traction rod 8 to rotate.

[0038] like Figure 1 , 3As shown, the improvement of the present application is that the armature 3 moves in a straight line relative to the conductive plate 1, and the pull rod 5 and / or the armature 3 and the bracket 4 slide together to limit the moving track of the armature 3. In this way, the armature 3 moves in a straight line relative to the bracket 4 and the conductive plate 1, and the moving track of the armature 3 is limited by the pull rod 5 and / or the armature 3 and the bracket 4 sliding together. The overall structure is smaller than that of the solenoid type electromagnetic release, and the moving track is a straight line, which requires less space, which is conducive to meeting the miniaturization design requirements of the circuit breaker.

[0039] Preferably, the bracket 4 and the conductive plate 1 are spaced apart from each other to form a moving space between the bracket 4 and the conductive plate 1, so that the armature 3 and the pull rod 5 can move linearly in the moving space. The relatively closed moving space formed by the bracket 4 and the conductive plate 1 can prevent the armature 3 and the pull rod 5 from being disturbed by the outside during the movement.

[0040] Furthermore, the bracket 4 can be a plate-shaped structure, and the bracket 4 is parallel to the conductive plate 1 to form a moving space. The bracket 4 can also be a frame structure. The bracket 4 of the frame structure is at least arranged around the outside of the armature 3 and / or the pull rod 5, and is used to slide with the armature 3 or the pull rod 5. In addition, when the bracket 4 is a plate-shaped structure, the bracket 4 can also be arranged at the side position of the conductive plate 1, so that the side of the armature 3 or the pull rod 5 can slide with the bracket 4.

[0041] A sliding structure that cooperates with each other is arranged between the bracket 4 and the pull rod 5, and the sliding structure includes a sliding portion and a sliding groove 51 that slidably cooperate with each other, wherein the sliding groove 51 is preferably a strip groove, and the sliding portion is protrudingly arranged on the bracket 4 or the pull rod 5, and correspondingly, the sliding groove 51 is opened on the pull rod 5 or the bracket 4. Of course, the sliding portion can be a part arranged on the bracket 4 or the pull rod 5, for example, a fastening screw arranged on the bracket 4 or the pull rod 5, and the part of the fastening screw protruding from the bracket 4 can be used as the sliding portion.

[0042] Preferably, Figure 1 and 3 -5, the yoke 2 and the armature 3 are both U-shaped frame structures, and the opening of the yoke 2 and the opening of the armature 3 are spaced opposite to each other and cooperate to form a magnetic gap, wherein the central axis of the armature 3 is parallel to the plate surface of the conductive plate 1, and the central axis of the yoke 2 is perpendicular to the plate surface of the conductive plate 1. The yoke 2 and the armature 3 adopt a U-shaped frame structure, which is convenient for the two to cooperate and surround the outer side of the conductive plate 1, and it has the advantages of simple structure, low cost and small space occupation.

[0043] In addition, the electromagnetic release also includes at least one reset member, which is preferably a spring, and the reset member is connected to the armature 3 and / or the pull rod 5. Preferably, the reset member includes a first reset member 61 and a second reset member 62, wherein the first reset member 61 is connected to the armature 3, and the second reset member 62 is connected to the pull rod 5, so as to facilitate resetting the armature 3 and the pull rod 5.

[0044] Combination Figure 1 , 3 -8 provides a specific embodiment of the electromagnetic release.

[0045] like Figure 1 , 3 As shown, the electromagnetic release includes a conductive plate 1, a yoke 2, an armature 3 and a bracket 4. The conductive plate 1 and the bracket 4 are both straight plate structures. The bracket 4 is spaced apart from the conductive plate 1, and a moving space is formed between the bracket 4 and the conductive plate 1. The armature 3 is arranged in the moving space, and the yoke 2 is arranged on the side of the conductive plate 1 facing away from the armature 3. It can also be understood that the middle part of the conductive plate 1 passes through the gap between the armature 3 and the yoke 2, and the two ends of the yoke 2 are respectively bent along the two side edges of the conductive plate 1 and extend in the direction close to the armature 3. At this time, the yoke 2 and the armature 3 are cooperated to surround the outer side of the conductive plate 1, and a gap as a magnetic gap is left between the yoke 2 and the armature 3. A pull rod 5 is connected to the armature 3, and the pull rod 5 and the armature 3 move linearly in the moving space between the bracket 4 and the conductive plate 1. The moving trajectory of the armature 3 and the pull rod 5 is parallel to the plane where the conductive plate 1 is located. The pull rod 5 and the bracket 4 are used to limit the moving trajectory of the armature 3.

[0046] In this embodiment, a reset member is further configured, and the reset member includes a first reset member 61 and a second reset member 62, wherein the first reset member 61 is a spring, one end of the first reset member 61 is connected to the end of the armature 3 facing away from the pull rod 5, and the other end of the first reset member 61 is used to be connected to the inside of the circuit breaker, so as to drive the armature 3 to reset; the second reset member 62 is also a spring, Figure 1 In the figure, two second reset members 62 are arranged on the pull rod 5, one end of the second reset member 62 is in contact with the pull rod 5, and the other end is used to be connected with the inside of the circuit breaker, so as to drive the pull rod 5 to reset. The number of the first reset member 61 and the second reset member 62 is set according to actual needs. Of course, only the first reset member 61 or only the second reset member 62 can also be set.

[0047] In the present embodiment, one end of the conductive plate 1 is folded back on the side facing away from the armature 3 to form a stationary contact plate 71. At this time, the stationary contact plate 71 cooperates with a partial area of ​​the conductive plate 1 to form a U-shaped structure. A gap that can accommodate the yoke 2 is formed between the stationary touch plate 71 and the middle of the conductive plate 1. A stationary contact 72 is provided on the side of the stationary touch plate 71 facing away from the conductive plate 1. That is, the stationary contact plate 71 can form a stationary contact of the circuit breaker pole after the stationary contact 72 is provided. Of course, one end of the conductive plate 1 can also only provide a connecting portion for connecting with the stationary contact provided inside the circuit breaker pole, and the other end of the conductive plate 1 is electrically connected to a corresponding terminal.

[0048] Combination Figure 1 , 3 4 provide a specific structure of a yoke 2 and an armature 3.

[0049] like Figure 3 , 4 As shown, the yoke 2 includes a plate-shaped yoke body, and the two ends of the yoke body are bent in the same direction to form a pair of first attraction walls 21 spaced opposite to each other. The area connected between the two first attraction walls 21 is the first connecting wall, so that the yoke 2 as a whole is a U-shaped frame structure, and the ends of the two first attraction walls 21 away from the first connecting wall are the openings of the yoke 2, and the plate surface where each first attraction wall 21 is located is perpendicular to the middle plate surface of the conductive plate 1, and the first attraction wall 21 is higher than the plate surface of the conductive plate 1, and at least one side edge of each first attraction wall 21 serves as a first attraction surface 211. In this embodiment, the end face of the first attraction wall 21 protrudes from the conductive plate 1, and the end face of the first attraction wall 21 serves as the first attraction surface 211, that is, the first attraction surface 211 is located at the edge of one side of the first attraction wall 21 away from the conductive plate 1, and the first attraction surface 211 is preferably an inclined surface. In addition, the yoke 2 can be formed by stacking a plurality of yoke bodies.

[0050] like Figure 1 , 3 As shown in Figure 5, the armature 3 includes a straight plate-shaped armature body, the two ends of the armature body are bent in the same direction to form a pair of spaced opposite second suction walls 31, the area connected between the two second suction walls 31 is the second connecting wall, so that the armature 3 is a U-shaped frame structure as a whole, the ends of the two second suction walls 31 away from the second connecting wall are the openings of the armature 3, each second suction wall 31 and the plane where the second connecting wall is located are perpendicular to the plane where the conductive plate 1 is located, and one side edge of the second suction wall 31 serves as the second suction surface 31 1 is used to cooperate with the first suction surface 211. In this embodiment, the edge of the second suction wall 31 close to the conductive plate 1 is used as the second suction surface 311. The second suction surface 311 is also an inclined surface, and the first suction surface 211 and the second suction surface 311 have the same degree of inclination. A magnetic gap is formed between the first suction surface 211 and the second suction surface 311. The first suction surface 211 and the second suction surface 311 use inclined surfaces with the same inclination, so that the armature 3 and the yoke 2 have a longer matching surface, which is conducive to ensuring the suction stability of the two. In addition, the armature 3 can also be formed by stacking multiple armature bodies.

[0051] It should be noted that the central axis of the yoke 2 of the present embodiment refers to the symmetry axis of the two first attraction walls 21 , and the central axis of the armature 3 refers to the symmetry axis of the two second attraction walls 31 .

[0052] Combination Figure 1 , 3 , 6 and 7 provide a specific structure of a pull rod 5, the pull rod 5 includes a body 50, the body 50 is a plate-shaped structure with unequal widths at both ends, and the width of the body 50 gradually decreases. Figure 6 , 7In the embodiment, the width of the body 50 is gradually reduced in a step-like manner, the end of the body 50 with a larger width is fixedly connected to the armature 3, and the end of the body 50 with a smaller width is provided with a through hole as a tripping driving part 52, and a slide groove 51 is provided in the middle of the body 50, and the slide groove 51 is a strip groove, and the length of the slide groove 51 is equal to the moving stroke of the armature 3, and a second groove a2 is provided on the body 50 at least on one side of the slide groove 51, Figure 3 , 7 In the embodiment, two second grooves a2 are symmetrically arranged on both sides of the slide groove 51, and a second fixing portion a1 is further arranged at one end of each second groove a2. When the second restoring member 62 is arranged in the second groove a2, one end of the second restoring member 62 abuts against the second fixing portion a1.

[0053] In this embodiment, the bracket 4 is a plate-shaped structure, the bracket 4 is parallel to the conductive plate 1, and the length of the bracket 4 is smaller than the length of the conductive plate 1. A fastening screw is provided on the bracket 4, which can fix the bracket 4 inside the circuit breaker. The fastening screw can be used as a sliding part to slide with the slide groove 51 of the pull rod 5 to limit the stroke of the pull rod 5 and the armature 3.

[0054] As another embodiment, the bracket 4 can also be set at the side position of the conductive plate 1. In this case, the structure of the bracket 4 can also adopt the above-mentioned structure, except that the plane where the bracket 4 is located and the plane where the conductive plate 1 is located are at an angle, for example, perpendicular to each other. Such a structure can also cooperate with the pull rod 5 to limit the movement trajectory of the armature 3, but the overall space occupied is larger, and the armature 3 is easily disturbed during movement.

[0055] As another embodiment, the bracket 4 can be a U-shaped frame covered outside the armature 3 and the pull rod 5, the bracket 4 of the U-shaped frame has a plane spaced opposite to the conductive plate 1, a moving space is formed between the plane and the conductive plate 1, and a sliding structure that cooperates with each other is provided between the pull rod 5 and the plane, and the sliding structure can adopt the structure in the above embodiment, so as to limit the moving track of the armature 3. Of course, the armature 3 and the pull rod 5 can slide with the bracket 4 at the same time.

[0056] Of course, when the electromagnetic release is arranged in the circuit breaker, the bracket 4 can also be omitted, and a part of the fixed area in the circuit breaker can be directly used as the bracket 4 for sliding cooperation with the armature 3 or the pull rod 5.

[0057] Combination Figure 1 , 2 A circuit breaker is provided.

[0058] The circuit breaker includes a shell, in which an operating mechanism, a traction rod 8 and three circuit breaker poles are arranged, wherein the operating mechanism is rotatably arranged in the middle and upper part of the shell, the traction rod 8 is rotatably arranged on one side of the operating mechanism, three push rods 81 are sleeved on the traction rod 8, each push rod 81 is respectively provided with a triggering part 811 corresponding to a circuit breaker pole, and the three circuit breaker poles are arranged in parallel in the middle part of the shell, corresponding to the bottom of the operating mechanism and the traction rod 8; each circuit breaker pole includes a pair of wiring terminals and a contact mechanism connected between the pair of wiring terminals, the contact mechanism includes a moving contact and a stationary contact that cooperate with each other, the moving contact is connected to the operating mechanism, and the stationary contact is fixedly arranged inside the circuit breaker pole; each circuit breaker pole is also provided with the above-mentioned In the electromagnetic release of the embodiment, one end of the conductive plate 1 of the electromagnetic release is connected to a wiring terminal, and the other end is connected to the static contact, or the static contact is formed by the other end of the conductive plate 1, the trigger part 811 is correspondingly connected to the release drive part 52 on the pull rod 5, and the bracket 4 is fixed to the inside of the shell by fastening screws. At the same time, a first mounting groove (not shown) and a second groove a2 are provided inside the shell, and the first mounting groove is used to assemble the first reset member 61. A first fixing part can be provided in the first mounting groove, and the two ends of the first reset member 61 are respectively connected to the first fixing part and the armature 3, and the second groove a2 in the shell corresponds to the second groove a2 of the pull rod 5 to form a second mounting groove for limiting the second reset member 62.

[0059] In this embodiment, the housing includes an upper cover 91, a base 92, a bottom and two end covers, wherein the upper cover 91, the base 92 and the bottom are arranged in sequence to form a housing body, and the two end covers are respectively covered at the opposite ends of the housing body, and the interior of the housing body is divided into three installation cavities, each installation cavity is used to set a circuit breaker pole, and the operating mechanism and the traction rod 8 are correspondingly arranged at the connection between the housing body and one end cover, and the connection between the housing body and the other end cover can be used to set the wiring terminal of each circuit breaker pole, and the traction rod 8 spans the three The mounting cavities are used to cooperate with the electromagnetic releases in the three circuit breaker poles. The contact mechanism of each circuit breaker pole is arranged between the base 92 and the base. The electromagnetic release is arranged between the upper cover 91 and the base 92. One end of the conductive plate 1 is connected to the wiring terminal, and the other end of the conductive plate 1 can pass through the base 92, so that the conductive plate 1 is connected to the static contact or forms a static contact on the side of the base 92 facing away from the upper cover 91. The bracket 4 can be fixedly connected to the upper cover 91 or the base 92. The second groove a2 in the shell and the first mounting groove are arranged on the base 92.

[0060] Preferably, the base 92 is further provided with at least one pair of positioning parts 921, and the positioning parts 921 cooperate to limit the moving track of the pull rod 5, such as Figure 2As shown, two pairs of positioning portions 921 are provided on the base 92, wherein the spacing between one pair of positioning portions 921 is smaller, and the spacing between the other pair of positioning portions 921 is larger, and a gap is left between each pair of positioning portions 921 for the pull rod 5 to move. The contact surface of each positioning portion 921 for contacting the pull rod 5 is an arc surface, and the specific shape of the positioning portion 921 is not limited.

[0061] In this embodiment, the region of the upper cover 91 opposite to the conductive plate 1 can be used as the bracket 4 , and a sliding structure that cooperates with each other is provided between the region and the armature 3 or the pull rod 5 .

[0062] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on directions or positional relationships shown in the drawings, or directions or positional relationships that are usually placed when in use, and are only for the convenience of description, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish descriptions, and cannot be understood as indicating relative importance.

[0063] The above contents are further detailed descriptions of the present invention in combination with specific preferred implementations, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. An electromagnetic release device, comprising a conductive plate (1), a yoke (2), an armature (3) and a bracket (4), wherein the conductive plate (1) passes through the gap between the yoke (2) and the armature (3), and the two ends of the yoke (2) are respectively bent along the two side edges of the conductive plate (1) and extend in a direction close to the armature (3), so that the yoke (2) and the armature (3) cooperate to surround the outer side of the conductive plate (1), and the yoke (2) and the armature (3) cooperate to form a magnetic gap on one side of the conductive plate (1), and a pull rod (5) is connected to the armature (3), characterized in that: The pull rod (5) and / or the armature (3) are linearly slidably matched with the bracket (4), and the armature (3) moves in a straight line relative to the conductive plate (1).

2. The electromagnetic release according to claim 1, characterized in that: The yoke (2) and the armature (3) are both U-shaped frame structures, and the opening of the yoke (2) and the opening of the armature (3) are spaced relative to each other to form a magnetic gap.

3. The electromagnetic release according to claim 2, characterized in that: The side walls on both sides of the opening of the magnetic yoke (2) are respectively first attraction walls (21), and the side walls on both sides of the opening of the armature (3) are respectively second attraction walls (31), the edges of the first attraction wall (21) and the second attraction wall (31) respectively form a first attraction surface (211) and a second attraction surface (311), and a magnetic gap is left between the first attraction surface (211) and the second attraction surface (311).

4. The electromagnetic release according to claim 3, characterized in that: The first attraction surface (211) and the second attraction surface (311) are inclined surfaces with the same inclination; the first attraction surface (211) is located at an edge of a side of the first attraction wall (21) away from the conductive plate (1), and the second attraction surface (311) is located at an edge of a side of the armature (3) close to the conductive plate (1).

5. The electromagnetic release according to claim 1, characterized in that: The bracket (4) is parallel to and opposite to the conductive plate (1), a moving space is reserved between the bracket (4) and the conductive plate (1), and the armature (3) and the pull rod (5) move in the moving space.

6. The electromagnetic release according to claim 1, characterized in that: A sliding structure that cooperates with each other is arranged between the bracket (4) and the pull rod (5), and the sliding structure includes a sliding part and a sliding groove (51) that cooperate with each other. The sliding part is protrudingly arranged on the bracket (4) or the pull rod (5), and the sliding groove (51) is opened on the pull rod (5) or the bracket (4).

7. The electromagnetic release according to claim 1, characterized in that: A first reset member (61) is connected to the side of the armature (3) facing away from the pull rod (5), and the pull rod (5) is connected to a second reset member (62).

8. The electromagnetic release according to claim 1, characterized in that: The pull rod (5) includes a body (50), and the body (50) is a plate-shaped structure with unequal widths at both ends, and the width of the body (50) gradually decreases. The end of the body (50) with a larger width is fixedly connected to the armature (3), and the end of the body (50) with a smaller width is provided with a through hole serving as a release drive part (52). A slide groove (51) is provided in the middle of the body (50), and a second groove (a2) is provided on the body (50) at least on one side of the slide groove (51).

9. The electromagnetic release according to claim 1, characterized in that: One end of the conductive plate (1) is folded back on the side facing away from the armature (3) to form a stationary contact plate (71), so that a gap for accommodating the magnetic yoke (2) is formed between the stationary contact plate (71) and the middle part of the conductive plate (1).

10. A circuit breaker, comprising a housing, an operating mechanism, a traction rod (8) and at least one circuit breaker pole arranged in the housing, the traction rod (8) being rotatably arranged on one side of the operating mechanism, each circuit breaker pole comprising a contact mechanism, the contact mechanism comprising a movable contact and a stationary contact cooperating with each other, the operating mechanism being connected to the movable contact of at least one circuit breaker pole, characterized in that: An electromagnetic release as claimed in any one of claims 1 to 9 is also arranged in each circuit breaker pole, and the pull rod (5) cooperates with the traction rod (8) to trigger the operating mechanism to trip.

11. The circuit breaker according to claim 10, characterized in that: The housing comprises a base (92) and an upper cover (91) covering the base (92); the electromagnetic release is arranged between the upper cover (91) and the base (92); one end of the conductive plate (1) passes through the base (92) and extends to a side of the base (92) facing away from the upper cover (91) for connection with a stationary contact.

12. The circuit breaker according to claim 10 or 11, characterized in that: A stationary contact plate (71) is formed at one end of the conductive plate (1), and a stationary contact point (72) is provided on one side of the stationary contact plate (71) facing away from the magnetic yoke (2) to form a stationary contact that cooperates with the moving contact.

13. The circuit breaker according to claim 10, characterized in that: One end of the pull rod (5) away from the armature (3) is provided with a through hole serving as a release drive unit (52), and the traction rod (8) is provided with at least one push rod (81), and the push rod (81) is connected to the release drive unit (52).

14. The circuit breaker according to claim 10, characterized in that: At least one pair of positioning parts (921) is arranged inside the circuit breaker pole, and a gap is left between each pair of positioning parts (921) for the pull rod (5) to move.

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