Miniature electromagnetic release

Abstract

The utility model relates to a miniature electromagnetic release. Relates to the technical field of trippers and comprises a yoke, one side of the yoke is fixedly connected with a coil framework component, and the other side of the yoke is fixedly connected with an elastic device. An armature is arranged above the yoke, and the top of the armature is attached to the bottom of the push rod; the elastic device comprises a fixed part, a connecting part is fixedly connected to the lower end of the side, away from the positioning component, of the fixed part, the bottom of the connecting part is rotationally connected with a stud, the upper end of the stud is sleeved with a movable part, and a nut is arranged on the inner side of the movable part and is in threaded connection with the stud. The connecting piece is provided with an elastic piece far away from the fixed piece; the nut and the movable part can be driven to move by rotating the stud, so that the elastic force of the elastic part is changed; the gap between the permanent magnet and the armature body can generate magnetic resistance, and the size of the gap can change the size of the magnetic resistance, so that the attraction force of the yoke to the armature is changed; the suction force of the permanent magnet can be changed by changing the volume of the permanent magnet; by changing the attraction force of the permanent magnet, the release can be suitable for different environments.

Description

Technical Field

[0001] The utility model relates to the technical field of releases, in particular to a miniature electromagnetic release. Background Art

[0002] A trip unit is a device mechanically connected to a circuit breaker to release the holding mechanism and automatically disconnect the circuit breaker. Trips are divided into thermal trip units, electromagnetic trip units, and compound trip units. Different trip units have different usage environments. Thermal trip units are mainly used for overload protection and are sensitive to long-term overcurrent. They are generally suitable for low-voltage circuit breakers in households and small industrial equipment. Electromagnetic trip units are mainly used for short-circuit protection and can quickly cut off high-current faults. They are widely used in various types of circuit breakers. Compound trip units are composed of thermal trip units and electromagnetic trip units and are suitable for occasions with higher protection requirements, such as circuit breakers in industrial and commercial power systems.

[0003] Among various types of trip devices, electromagnetic trip devices are the most widely used. Chinese Patent Publication No. CN207834222U discloses a magnetic flux trip device, which includes a trip device housing, a magnetic flux unit disposed in the middle of the trip device housing, and a push rod and a reset guide rod disposed in the trip device housing and cooperating with the magnetic flux unit. The magnetic flux unit includes a push rod for driving the push rod. The reset guide rod includes a reset guide rod latch disposed at one end thereof and a reset guide rod reset plate disposed at the other end thereof. The reset guide rod latch cooperates with the push rod limiter, and the reset guide rod reset plate is elastically connected to the trip device housing via a reset guide rod reset spring.

[0004] The above-mentioned release utilizes the action of the magnetic flux unit, the push rod drives the push rod to rotate, the reset guide rod clamping hand clamps the push rod, and the reset guide rod reset plate is pressed to release the cooperation between the reset guide rod clamping hand and the push rod, and the push rod is automatically reset; the reset unit of the above-mentioned release adopts a reset spring. Although the elastic force generated by the spring can drive the reset guide rod to move, the spring will produce elastic fatigue after long-term use, resulting in the weakening of the elastic force of the spring, causing the reset guide rod to loosen; in addition, the release is used in different scenarios, and the requirements for the elastic force of the spring inside it are also different. The elastic force of the spring of the above-mentioned release is fixed, and its elastic force cannot be adapted according to the needs of the use scenario, which makes the application range of the above-mentioned release small and cannot meet the requirements of the versatility of the release. Utility Model Content

[0005] Technical problems to be solved

[0006] The purpose of the utility model is to overcome the shortcomings of the existing technology and adapt to actual needs. It provides a miniature electromagnetic release, which can adjust the position of the nut and the movable part by rotating the stud. The movable part can change the length of the elastic part when it moves. The elastic force of the elastic part can be changed according to work needs, and the elastic force of the elastic part can be adjusted when the elastic part produces elastic fatigue, so that the elastic force of the elastic part is always at an appropriate size to solve the above technical problems.

[0007] Technical Solution

[0008] In order to achieve the purpose of this utility model, the technical solution adopted by this utility model is:

[0009] A miniature electromagnetic release comprises a yoke, one side of which is fixedly connected to a coil frame component and the other side of which is fixedly connected to an elastic device; an armature is provided above the yoke, and the top of the armature is in contact with the bottom of a push rod;

[0010] The elastic device includes a fixing member, the lower end of which is fixedly connected to a connecting member on a side away from the positioning member, the bottom of the connecting member is rotatably connected to the stud, the upper end of the stud is sleeved with a movable member, the movable member is C-shaped, and a nut is provided on the inner side of the movable member, and the nut is threadedly connected to the stud; a rectangular groove is provided on the inner side of the connecting member, and the screw, movable member and nut are all located in the rectangular groove of the connecting member; the connecting member is provided with an elastic member on the side away from the fixing member, and hooks are provided on the top and bottom of the elastic member, and the bottom of the elastic member is clamped with the end of the movable member through the hook;

[0011] The armature includes an armature body, a bent piece is provided in the middle of one end of the armature body close to the elastic piece, and the top of the elastic piece is clamped with the bent piece through a hook; grooves are provided on both sides of one end of the armature body close to the bent piece, and the concave surface of the groove of the armature body is rotatably connected to the top of the fixing piece.

[0012] As a further technical solution of the present invention, two convex plates are provided on the top of the fixing piece, and the two convex plates are respectively rotatably connected to the concave surfaces of the two grooves of the armature body; the upper end of one of the two convex plates is bent inward and L-shaped, and the two convex plates are respectively located in the two grooves.

[0013] As a further technical solution of the present invention, the yoke includes two yoke bodies, and the two yoke bodies are fixedly connected to each other as a whole; both ends of the yoke body are provided with a convex column, and the yoke body as a whole is concave; the yoke body is fixedly connected to the permanent magnet, and the permanent magnet is located between the two convex columns of the yoke body; the fixing piece is sleeved on the outer side of the convex column at one end of the yoke body close to the elastic piece.

[0014] As a further technical solution of the present invention, the coil skeleton component includes a column, which is sleeved on the outside of the protruding column at one end of the yoke body away from the fixing part; the top of the column is fixedly connected to the upper trough body, and the bottom is fixedly connected to the lower trough body; a through groove is provided in the middle of the column, which passes through the upper trough body, the column and the lower trough body, and the protruding column of the yoke body is located in the through groove.

[0015] As a further technical solution of the present invention, the upper slot body is provided with a through slot 2 that passes through the upper slot body at one end away from the through slot 1, and the through slot 2 corresponds to the position of the permanent magnet; pins are fixedly connected on both sides of the lower end of the lower slot body, and the pins are L-shaped; an inner slot is provided on the top of the upper slot body, and the inner slot of the upper slot body corresponds to the position of the armature body, and the width of the inner slot of the upper slot body is greater than the width of the armature body; an inner slot is provided on the bottom of the lower slot body, and the two yoke iron bodies are both located in the inner slot of the lower slot body; and multiple slots 2 are provided on both sides of the upper slot body.

[0016] As a further technical solution of the present invention, a lower shell is provided on the outer side of the yoke, which is clamped with the upper shell; the elastic device, armature, push rod, yoke, permanent magnet and positioning component are all located in the internal space after the lower shell and the upper shell are connected.

[0017] As a further technical solution of the present invention, the upper shell includes an upper shell body, and multiple slots are provided on both sides of the lower end of the upper shell body; a movable hole is provided on the top of the upper shell body, the position of the movable hole corresponds to the position of the push rod, and the diameter of the movable hole is larger than the diameter of the upper end of the push rod; the upper end of the push rod is cylindrical and the lower end is umbrella-shaped.

[0018] As a further technical solution of the present invention, the lower shell includes a lower shell, which is provided with multiple card blocks on both sides of the upper end, and the positions of the multiple card blocks correspond to the positions of the multiple card slots; an operating hole is provided at one end of the bottom of the lower shell, and the position of the operating hole corresponds to the position of the stud; two rectangular holes are symmetrically provided at the end of the lower shell away from the operating hole, and the positions of the two rectangular holes correspond to the positions of the two pins, and the end of the pin away from the lower slot extends to the bottom of the lower shell through the rectangular holes; multiple card blocks are provided at the upper ends of both sides of the interior of the lower shell, and the multiple card blocks correspond to the positions of the multiple card slots.

[0019] Beneficial effects:

[0020] A. In the present invention, a coil is sheathed on the outside of the coil frame column. Under normal conditions, the armature body is attracted by the magnetic force of the permanent magnet and is completely fitted into the inner groove of the upper groove body. At the same time, the bent piece at the end of the armature body stretches the elastic piece, making the elastic piece in a stable and tight state. When a short circuit occurs or the current passing through the circuit breaker reaches or exceeds the instantaneous current setting value, the magnetic field generated by the yoke iron inside the coil ring overcomes the magnetic field generated by the permanent magnet. The attraction effect of this magnetic field force on the armature body is less than the pulling effect of the elastic force of the elastic piece on the armature body. At this time, the elastic piece will Pull the armature body, causing it to rotate around its connection with the fixed part, away from the permanent magnet. As it moves, the armature body pushes the push rod upward, causing the circuit breaker to trip. (How the tripper causes the circuit breaker to trip is a known technique, and its connection and operating principles are not detailed here.) The permanent magnet has a strong magnetic field and can generate a sufficient magnetic field strength. This magnetic field strength is crucial to the function of the tripper, as it ensures stable performance and reliable tripping in the face of various operating environments and changing conditions.

[0021] B. In the present invention, the nut can be driven to move vertically by rotating the stud, and the nut simultaneously drives the movable part to move. During the movement of the movable part, the elastic force of the elastic part can be changed. By changing the elastic force of the elastic part, the adsorption force of the permanent magnet on the armature body through the yoke iron magnetic conduction can be changed. In addition, the gap between the permanent magnet and the armature body generates magnetic resistance, and the size of the gap between the magnet and the armature can also change the magnitude of the magnetic resistance. The smaller the magnetic resistance, the greater the attraction, and conversely, the greater the magnetic resistance, the smaller the attraction. The attraction of the permanent magnet can also be changed by changing the volume of the permanent magnet. The attraction of the permanent magnet can be changed by the above multiple methods, thereby making the release suitable for different environments.

[0022] C. In the present invention, the armature body and the yoke body are both punched using punching technology, which makes the structures of the armature body and the yoke body straight, ensuring that the internal organizational structures of the armature body and the yoke body are not damaged, thereby ensuring that the magnetic circuit system in the release is not bent, so that the magnetic circuit system always remains stable; in addition, the rotation fulcrum where the armature body and the yoke body contact is set in an arc shape, which can reduce the damage caused by the friction between the armature body and the yoke body when the armature body rotates; one of the convex plates on the top of the fixing part is bent inward and formed into an L shape. This convex plate can limit the rotation angle of the armature, prevent the armature body from rotating too much, and cooperate with the two grooves to prevent the armature from shifting and causing displacement.

[0023] D. In the present invention, the lower shell is clamped to the upper shell through multiple clamping blocks, and at the same time, the lower shell is clamped to the upper slot body through multiple clamping blocks. After the lower shell and the upper shell are clamped and fixed, there is a staggered contact surface at the joint of the lower shell and the upper shell. The staggered contact surface can play a sealing role, preventing external dust from entering the interior of the lower shell and the upper shell through the gap at the connection between the lower shell and the upper shell, thereby ensuring the stability of the magnetic circuit system inside the lower shell and the upper shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0025] Figure 2 For this utility model Figure 1 A top view of

[0026] Figure 3 For this utility model Figure 2 AA cross-sectional view;

[0027] Figure 4 This is a schematic diagram of the three-dimensional structure of the upper shell of the utility model;

[0028] Figure 5 For this utility model Figure 4 Bottom view of

[0029] Figure 6 This is a schematic diagram of the three-dimensional structure of the lower shell of the utility model;

[0030] Figure 7 For this utility model Figure 6 Bottom view of

[0031] Figure 8 This is a schematic diagram of the normal state of the utility model;

[0032] Figure 9 This is a schematic diagram of the use state of the utility model;

[0033] Figure 10 For this utility model Figure 8 Schematic diagram of part of the structure;

[0034] Figure 11 For this utility model Figure 10 Another perspective of the picture;

[0035] Figure 12 For this utility model Figure 9 Schematic diagram of part of the structure;

[0036] Figure 13 For this utility model Figure 12 Another perspective of the picture;

[0037] Figure 14 For this utility model Figure 10 Schematic diagram of part of the structure;

[0038] Figure 15 For this utility model Figure 14 Schematic diagram of part of the structure;

[0039] Figure 16 This is a diagram showing the positional relationship between the yoke and the permanent magnet of the present utility model;

[0040] Figure 17 For this utility model Figure 11 Schematic diagram of part of the structure;

[0041] Figure 18 For this utility model Figure 17 The main view;

[0042] Figure 19 For this utility model Figure 12 Schematic diagram of part of the structure;

[0043] Figure 20 For this utility model Figure 19 The main view;

[0044] Figure 21 This is a schematic diagram of the three-dimensional structure of the armature of the present invention;

[0045] Figure 22 For this utility model Figure 19 Schematic diagram of part of the structure;

[0046] Figure 23 For this utility model Figure 17 Schematic diagram of part of the structure.

[0047] In the figure: 1-elastic device, 2-armature, 3-push rod, 4-yoke, 5-permanent magnet, 6-coil skeleton component, 7-lower housing, 8-upper housing, 9-pin;

[0048] 11-fixing part, 12-connecting part, 13-stud, 14-movable part, 15-nut, 16-elastic part, 21-armature body, 22-groove, 23-bending part, 41-yoke body, 42-processing hole, 61-upper trough body, 62-through slot 1, 63-through slot 2, 64-column, 65-lower trough body, 66-slot 2, 71-lower shell, 72-block 1, 73-operating hole, 74-rectangular hole, 75-block 2, 81-upper shell, 82-slot 1, 83-movable hole. DETAILED DESCRIPTION

[0049] See also Figure 1-4 , Figure 12-13 , Figure 15-19A miniature electromagnetic release includes a yoke 4, one side of which is fixedly connected to a coil skeleton component 6 and the other side is fixedly connected to an elastic device 1; an armature 2 is provided above the yoke 4, and the top of the armature 2 is in contact with the bottom of a push rod 3;

[0050] The elastic device 1 includes a fixing member 11, the lower end of which is fixedly connected to a connecting member 12 on a side away from the coil skeleton component 6, the bottom of the connecting member 12 is rotatably connected to a stud 13, and the upper end of the stud 13 is sleeved with a movable member 14, which is C-shaped and has a nut 15 on the inner side of the movable member 14, which is threadedly connected to the stud 13; a rectangular groove is provided on the inner side of the connecting member 12, and the stud 13, the movable member 14 and the nut 15 are all located in the rectangular groove of the connecting member 12; the connecting member 12 is provided with an elastic member 16 on the side away from the fixing member 11, and hooks are provided on the top and bottom of the elastic member 16, and the bottom of the elastic member 16 is clamped with the end of the movable member 14 through the hook;

[0051] The coil skeleton component 6 includes a column 64, which is sleeved on the outer side of the protrusion of the yoke body 41 at the end away from the fixing member 11; the top of the column 64 is fixedly connected to the upper trough 61, and the bottom is fixedly connected to the lower trough 65; a through slot 1 62 is provided in the middle of the column 64, which passes through the upper trough 61, the column 64 and the lower trough 65, and the protrusion of the yoke body 41 is located in the through slot 1 62;

[0052] The upper slot body 61 is provided with a second through slot 63 extending through the upper slot body 61 at one end away from the first through slot 62, and the second through slot 63 corresponds to the position of the permanent magnet 5; the coil pins 9 are fixedly connected to both sides of the lower end of the lower slot body 65, and the coil pins 9 are L-shaped; the top of the upper slot body 61 is provided with an inner slot, which corresponds to the position of the armature body 21, and the width of the inner slot of the upper slot body 61 is greater than the width of the armature body 21; the bottom of the lower slot body 65 is provided with an inner slot, and the two yoke iron bodies 41 are both located in the inner slot of the lower slot body 65; and a plurality of second clamping slots 66 are provided on both sides of the upper slot body 61;

[0053] By adopting the above technical solution, the rotating stud 13 can drive the nut 15 to move vertically, and the nut 15 synchronously drives the movable part 14 to move. The movable part 14 can change the elastic force of the elastic part 16 during the movement. By changing the elastic force of the elastic part 16, the adsorption force of the permanent magnet 5 on the armature body 21 through the yoke iron magnetic conductor 4 can be changed; in addition, the gap between the permanent magnet 5 and the armature body 21 will produce magnetic resistance, and the size of the gap between the magnet 5 and the armature 2 can also change the size of the magnetic resistance. The smaller the magnetic resistance, the greater the suction force, and conversely, the greater the magnetic resistance, the smaller the suction force; the suction force of the permanent magnet 5 can also be changed by changing the volume of the permanent magnet 5; the suction force of the permanent magnet 5 can be changed by the above-mentioned multiple methods, so that the releaser can be suitable for different environments.

[0054] See also Figure 13-19 In this embodiment, the armature 2 includes an armature body 21. A bent piece 23 is provided in the middle of one end of the armature body 21 close to the elastic member 16, and the top of the elastic member 16 is engaged with the bent piece 23 via a hook. Grooves 22 are provided on both sides of one end of the armature body 21 close to the bent piece 23, and the concave surface of the groove 22 of the armature body 21 is rotatably connected to the top of the fixing member 11.

[0055] The fixing member 11 is provided with two convex plates on the top, and the two convex plates are respectively rotatably connected to the concave surfaces of the two grooves 22 of the armature body 21; the upper end of one of the two convex plates is bent inward and L-shaped, and the two convex plates are respectively located in the two grooves 22;

[0056] By adopting the above technical solution, a coil is sheathed on the outside of the coil skeleton column 64. Under normal conditions, the armature body 21 is close to the permanent magnet 5 under the adsorption effect of the permanent magnet 5 through the magnetic force of the yoke iron magnetic conductor 4, and is completely fitted into the inner groove of the upper groove body 61. At the same time, the bent piece 23 at the end of the armature body 21 stretches the elastic piece 16, so that the elastic piece 16 is in a stable and tight state; when a short circuit occurs, the current passing through the circuit breaker reaches or exceeds the instantaneous current setting value, etc., the magnetic field generated by the yoke iron inside the coil ring overcomes the magnetic field generated by the permanent magnet 5, and the adsorption effect of this magnetic field force on the armature body 21 is less than the elastic force of the elastic piece 16 on the armature body 21. The elastic member 16 will pull the armature body 21, causing the armature body 21 to rotate away from the permanent magnet 5 with the connection point with the fixed member 11 as the center of the circle, and the armature body 21 will push the push rod 3 during the movement, causing the push rod 3 to move upward, thereby tripping the circuit breaker. How the release drives the circuit breaker to trip is an existing technology, and its connection and operation principle are not described in detail here. The permanent magnet 5 has a strong magnetism and can generate sufficient magnetic field strength. This magnetic field strength is crucial to realizing the function of the release because it can ensure that the release can maintain stable performance and reliable tripping effect when facing various working environments and changes in conditions.

[0057] See also Figure 14-15 , Figure 17 In this embodiment, the yoke 4 includes two yoke bodies 41, and the two yoke bodies 41 are fixedly connected to each other as a whole; both ends of the yoke body 41 are provided with a convex column, and the yoke body 41 is concave in shape as a whole; the yoke body 41 is fixedly connected to the permanent magnet 5, and the permanent magnet 5 is located between the two convex columns of the yoke body 41; the fixing member 11 is sleeved on the outer side of the convex column of the yoke body 41 near the end of the elastic member 16;

[0058] By adopting the above technical solution, the armature body 21 and the yoke body 41 are both punched out, so that the structures of the armature body 21 and the yoke body 41 are straight, ensuring that the internal organizational structures of the armature body 21 and the yoke body 41 will not be damaged, thereby ensuring that the magnetic circuit system in the releaser has no bending, so that the magnetic circuit system always remains stable; in addition, the rotation fulcrum where the armature body 21 contacts the yoke body 41 is arc-shaped, which can reduce the damage caused by the friction between the armature body 21 and the yoke body 41 when the armature body 21 rotates; one of the convex plates on the top of the fixing part 11 is bent inward and is L-shaped. The convex plate can limit the rotation angle of the armature to prevent the rotation amplitude of the armature body 21 from being too large, and cooperate with the two grooves 22 to prevent the armature from shifting and causing displacement.

[0059] See also Figure 1-13 In this embodiment, a lower shell 7 is provided on the outer side of the yoke 4, and the lower shell 7 is clamped with the upper shell 8; the elastic device 1, the armature 2, the push rod 3, the yoke 4, the permanent magnet 5 and the positioning component 6 are all located in the internal space after the lower shell 7 and the upper shell 8 are connected;

[0060] The upper housing 8 includes an upper shell 81, and a plurality of slots 82 are provided on both sides of the lower end of the upper shell 81; a movable hole 83 is provided on the top of the upper housing 8, the position of the movable hole 83 corresponds to the position of the push rod 3, and the diameter of the movable hole 83 is larger than the diameter of the upper end of the push rod 3; the upper end of the push rod 3 is cylindrical and the lower end is umbrella-shaped;

[0061] The lower housing 7 includes a lower housing 71, and a plurality of card blocks 72 are provided on both sides of the upper end of the lower housing 71, and the positions of the plurality of card blocks 72 correspond to the positions of the plurality of card slots 82 respectively; an operating hole 73 is provided at one end of the bottom of the lower housing 71, and the position of the operating hole 73 corresponds to the position of the screw 13; two rectangular holes 74 are symmetrically provided at the end of the lower housing 71 away from the operating hole 73, and the positions of the two rectangular holes 74 correspond to the positions of the two pins 9 respectively, and the end of the pin 9 away from the lower slot 65 extends to the bottom of the lower housing 71 through the rectangular holes 74; a plurality of card blocks 75 are provided on the upper ends of both sides of the interior of the lower housing 7, and the plurality of card blocks 75 correspond to the positions of the plurality of card slots 66 respectively;

[0062] By adopting the above technical solution, the lower shell 71 is clamped to the upper shell 81 through multiple clamping blocks 72, and at the same time, the lower shell 71 is clamped to the upper slot 61 through multiple clamping blocks 72; after the lower shell 71 and the upper shell 81 are clamped and fixed, there is a staggered contact surface at the fitting point of the lower shell 71 and the upper shell 81, and the staggered contact surface can play a sealing role to prevent external dust from entering the interior of the lower shell 71 and the upper shell 81 through the gap at the connection between the lower shell 71 and the upper shell 81, thereby ensuring the stability of the magnetic circuit system inside the lower shell 71 and the upper shell 81.

[0063] The embodiments disclosed in the present invention are preferred embodiments, but are not limited to them. Ordinary technicians in this field can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. As long as they do not deviate from the spirit of the present invention, they are all within the scope of protection of the present invention.

Claims

1. A miniature electromagnetic release, characterized in that: It comprises a yoke (4), one side of which is fixedly connected to a coil frame component (6) and the other side of which is fixedly connected to an elastic device (1); an armature (2) is provided above the yoke (4), and the top of the armature (2) is in contact with the bottom of a push rod (3); The elastic device (1) comprises a fixing member (11), the lower end of the fixing member (11) away from the positioning member is fixedly connected to a connecting member (12), the bottom of the connecting member (12) is rotatably connected to the stud (13), the upper end of the stud (13) is sleeved with a movable member (14), the movable member (14) is C-shaped, and a nut (15) is provided on the inner side of the movable member (14), and the nut (15) is threadedly connected to the stud (13); a rectangular groove is provided on the inner side of the connecting member (12), and the stud (13), the movable member (14) and the nut (15) are all located in the rectangular groove of the connecting member (12); the connecting member (12) away from the fixing member (11) is provided with an elastic member (16), the top and bottom of the elastic member (16) are both provided with hooks, and the bottom of the elastic member (16) is clamped with the end of the movable member (14) through the hook; The armature (2) comprises an armature body (21), a bent piece (23) is provided in the middle of one end of the armature body (21) close to the elastic piece (16), and the top of the elastic piece (16) is engaged with the bent piece (23) via a hook; grooves (22) are provided on both sides of one end of the armature body (21) close to the bent piece (23), and the concave surface of the groove (22) of the armature body (21) is rotatably connected to the top of the fixing piece (11).

2. The micro electromagnetic release according to claim 1, characterized in that: The fixing member (11) is provided with two convex plates on the top, and the two convex plates are respectively rotatably connected to the concave surfaces of the two grooves (22) of the armature body (21); the upper end of one of the two convex plates is bent inward and L-shaped, and the two convex plates are respectively located in the two grooves (22).

3. The micro electromagnetic release according to claim 2, characterized in that: The yoke (4) comprises two yoke bodies (41), and the two yoke bodies (41) are fixedly connected to each other as a whole; both ends of the yoke body (41) are provided with convex columns, and the yoke body (41) is in a concave shape as a whole; the yoke body (41) is fixedly connected to the permanent magnet (5), and the permanent magnet (5) is located between the two convex columns of the yoke body (41); the fixing member (11) is sleeved on the outer side of the convex column at one end of the yoke body (41) close to the elastic member (16).

4. The micro electromagnetic release as claimed in claim 3, characterized in that: The coil skeleton component (6) includes a column (64), which is sleeved on the outer side of the protrusion of the yoke body (41) at one end away from the fixing member (11); the top of the column (64) is fixedly connected to the upper trough body (61), and the bottom is fixedly connected to the lower trough body (65); a through groove (62) is provided in the middle of the column (64), and the through groove (62) passes through the upper trough body (61), the column (64) and the lower trough body (65), and the protrusion of the yoke body (41) is located in the through groove (62).

5. The micro electromagnetic release according to claim 4, characterized in that: The upper slot body (61) is provided with a second through slot (63) passing through the upper slot body (61) at one end away from the first through slot (62), and the second through slot (63) corresponds to the position of the permanent magnet (5); both sides of the lower end of the lower slot body (65) are fixedly connected with coil pins (9), and the coil pins (9) are L-shaped; the top of the upper slot body (61) is provided with an inner slot, and the inner slot of the upper slot body (61) corresponds to the position of the armature body (21), and the width of the inner slot of the upper slot body (61) is greater than the width of the armature body (21); the bottom of the lower slot body (65) is provided with an inner slot, and the two yoke iron bodies (41) are both located in the inner slot of the lower slot body (65); and a plurality of second clamping slots (66) are provided on both sides of the upper slot body (61).

6. The miniature electromagnetic release according to claim 5, characterized in that: A lower shell (7) is provided on the outer side of the yoke (4), and the lower shell (7) is clamped with the upper shell (8); the elastic device (1), the armature (2), the push rod (3), the yoke (4), the permanent magnet (5) and the coil skeleton component (6) are all located in the internal space after the lower shell (7) and the upper shell (8) are connected.

7. The miniature electromagnetic release according to claim 6, characterized in that: The upper shell (8) includes an upper shell (81), and a plurality of slots (82) are provided on both sides of the lower end of the upper shell (81); a movable hole (83) is provided on the top of the upper shell (8), the position of the movable hole (83) corresponds to the position of the push rod (3), and the diameter of the movable hole (83) is larger than the diameter of the upper end of the push rod (3); the upper end of the push rod (3) is cylindrical and the lower end is umbrella-shaped.

8. The miniature electromagnetic release according to claim 7, characterized in that: The lower shell (7) comprises a lower shell (71), wherein both sides of the upper end of the lower shell (71) are provided with a plurality of card blocks (72), and the positions of the plurality of card blocks (72) respectively correspond to the positions of the plurality of card slots (82); an operating hole (73) is provided at one end of the bottom of the lower shell (71), and the position of the operating hole (73) corresponds to the position of the stud (13); two rectangular holes (74) are symmetrically provided at one end of the lower shell (71) away from the operating hole (73), and the positions of the two rectangular holes (74) respectively correspond to the positions of the two coil pins (9), and the end of the coil pin (9) away from the lower slot (65) extends to the bottom of the lower shell (71) through the rectangular hole (74); a plurality of card blocks (75) are provided at the upper ends of both sides of the interior of the lower shell (7), and the plurality of card blocks (75) respectively correspond to the positions of the plurality of card slots (66).

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