Switching device

Abstract

The utility model relates to the technical field of switching devices, in particular to a switching device, which comprises a base and a moving part, the base comprises an iron core wound with a coil, the moving part comprises an armature, and the armature is attracted or disconnected with the iron core under the action of magnetic attraction force so as to form an armature pole face and an iron core pole face. At least one end part of the armature in the length direction is provided with a first concave part in the adsorption range of the armature pole surface, and the first concave part is of a discontinuous structure in the adsorption range of the iron core pole surface in the length direction; due to the non-continuous structure of the first concave part, the end part of the armature and the adsorption contact area of the pole surface of the iron core can be linearly and comprehensively covered along the width direction of the armature. According to the utility model, the first recessed part is added on the armature pole face, thereby reducing the contact area between the armature and the iron core, increasing the air gap between the armature pole face and the iron core pole face, reducing the suction force of the normally closed end iron core to the armature, reducing the breaking resistance of the normally closed end, and improving the action speed of a switching device.

Description

Technical Field

[0001] The utility model relates to the technical field of switch electrical appliances, in particular to a switch electrical appliance. Background Art

[0002] Switchgear refers to the switching equipment in the terms and definitions in GB / T 5226.1-2019 / IEC 60204-1:2016, that is, an appliance used to connect or disconnect the current of one or several circuits. Its specific component form can be circuit breakers, relays, disconnectors, etc. Figure 1 The figure shows a seesaw-type electromagnetic relay, in which the armature 1' of the moving part rotates with an axis as the central axis to realize the up and down movement of the two ends of the armature. When the first end 11' of the armature moves downward, its second end 12' tilts upward, and when the first end 11' of the armature 1' tilts upward, its second end 12' is pressed downward, so that the moving part forms a seesaw-type symmetrical structure. When the relay is in the reset state, the first end of the armature is in a state close to the iron core, and the second end is in a state away from the iron core, and the first end is attracted to the iron core below the armature by magnetic attraction, and the second end is disconnected from the iron core; when the relay is ready to switch to the set state, the first end of the armature needs to overcome the magnetic attraction of the permanent magnet and move in the direction away from the iron core. If the magnetic attraction between the armature and the iron core is too large at this time, it will take a longer time to disconnect the first end of the armature from the iron core.

[0003] like Figure 2 In the relay shown, when the first end 11' of the armature 1' is in a state close to the iron core, since there is surface contact between the armature 1' and the iron core 2', the contact area is large, and the air gap 101' between the armature 1' and the iron core 2' is small, the magnetic attraction between the armature 1' and the iron core 2' is large, which makes the response time of the relay longer, resulting in the relay being unable to adapt to scenarios with increasingly higher control accuracy. Summary of the invention

[0004] The utility model aims to solve the problem of long response time caused by small air gap between armature and iron core of existing relay, and provide a fast-response switch electrical appliance.

[0005] To achieve the above-mentioned purpose, the technical solution of the utility model is: a switching electrical appliance, including a base and a moving part, the base including an iron core wound with a coil, the moving part including an armature, the armature selectively attracting or disconnecting with the iron core under the action of magnetic attraction relative to the iron core, so that the armature forms an armature pole face facing the iron core, and the iron core forms an iron core pole face facing the armature, the armature is defined as having a direction from the middle toward one end of the iron core pole face as its length direction, and a direction perpendicular to it on an extension plane of the armature is defined as a width direction, at least one end of the armature along its length direction is provided with a first recessed portion within the adsorption range of the armature pole face, the first recessed portion is a discontinuous structure along the length direction within the adsorption range of the iron core pole face, and the discontinuous structure of the first recessed portion enables the adsorption contact area between the end of the armature and the iron core pole face to be linearly and fully covered along the width direction of the armature.

[0006] In one embodiment, within the adsorption range of the armature pole surface, the end of the armature and the core pole surface can form the adsorption contact area therebetween under the action of magnetic attraction, and the first recessed portion is configured as follows: a recess that does not contact the core pole surface is provided on the surface of the end of the armature corresponding to the adsorption range of the core pole surface, and the recess is interrupted and not completely connected along the length direction within the adsorption range of the entire core pole surface, thereby forming the discontinuous structure.

[0007] In one embodiment, the adsorption contact area is a line segment extending along the width direction.

[0008] In one embodiment, the first recessed portion is an inclined surface formed by machining the armature pole surface, the inclined surface extends from one end of the armature to the other end along the width direction of the armature, and the adsorption contact area is formed in the end area of ​​the inclined surface.

[0009] In one embodiment, the first recessed portion causes the armature pole surface to form a step structure, and a projection of the step structure on the plane where the core pole surface is located is located within the core pole surface.

[0010] In one embodiment, the armature is further provided with a second recessed portion, the second recessed portion is located on the armature pole surface, and the second recessed portion is farther from the end of the armature than the first recessed portion.

[0011] In one embodiment, the second recessed portion is a plurality of narrow grooves arranged at intervals.

[0012] In one embodiment, the armature is a flat and long strip structure, the length of which is greater than the width and height, and the second recessed portion extends along the length direction of the armature.

[0013] In one embodiment, the cross-sectional shape of the second recessed portion is an arc shape or a polygonal shape, so that the second recessed portion forms an arc-shaped recessed portion or a polygonal recessed portion accordingly.

[0014] In one embodiment, third recessed portions are provided at both ends of the armature, the third recessed portions are located on the armature pole surface, the normally closed end of the armature is provided with the first recessed portion, and the first recessed portion is formed in the third recessed portion.

[0015] In one embodiment, a coating made of organic plastic is disposed on the outside of the iron core, and the armature pole surface is attracted to the iron core by contacting the coating.

[0016] In one embodiment, the moving component is a seesaw-like symmetrical structure.

[0017] In one embodiment, the switching device is a relay.

[0018] The beneficial effects of the utility model are:

[0019] 1. The utility model adds a first recessed portion on the armature pole surface, thereby reducing the contact area between the armature and the iron core, increasing the air gap between the armature pole surface and the iron core pole surface when the armature and the iron core are attracted, reducing the suction force of the normally closed end iron core on the armature, reducing the resistance of the normally closed end armature and the iron core during the disconnection action, and improving the action speed of the switch electrical appliance.

[0020] 2. The first recessed portion is set to be a discontinuous structure within the adsorption range of the core pole surface along the length direction, so that the adsorption contact area between the end of the armature and the core pole surface can be fully covered linearly along the width direction of the armature, ensuring the size of the magnetic attraction between the armature and the core and ensuring the stability of the contact.

[0021] 3. The first recessed portion is provided on the armature pole surface so that the armature pole surface forms a step, which can capture the dividing line at the step more clearly and accurately. The dividing line can be used for key dimension measurement of parts and assembled components in actual production. At the same time, the step structure can also be used for positioning in the subsequent assembly process to improve the consistency of the contact position of the armature pole surface and the assembly accuracy.

[0022] 4. By setting the first recessed portion, the contact area between the armature pole surface and the core surface coating can be greatly reduced, thereby reducing the area of ​​vacuum negative pressure, and ultimately achieving the effect of reducing the breaking resistance, which is conducive to achieving reliable breaking of the armature under the same coil suction force, and ultimately making the relay operate more quickly.

[0023] 5. On the basis of the first recessed portion, a second recessed portion is set on the armature pole surface, which can also increase the air gap between the armature pole surface and the iron core pole surface and reduce the vacuum negative pressure area, further reduce the magnetic attraction and vacuum negative pressure attraction between the iron core and the armature, and further improve the response speed of the switching device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a cross-sectional view of an existing relay.

[0025] Figure 2 yes Figure 1 A is a partial enlarged view of the

[0026] Figure 3 It is a stereogram of embodiment 1 of the utility model.

[0027] Figure 4 It is a cross-sectional view of Example 1 of the utility model.

[0028] Figure 5 yes Figure 4 A partial enlarged view of B.

[0029] Figure 6 It is a three-dimensional diagram of the armature of Example 1 of the utility model.

[0030] Figure 7 It is the first discontinuous structure of the first recessed portion of the utility model.

[0031] Figure 8 This is the second discontinuous structure of the first recessed portion of the utility model.

[0032] Fig. 9 It is an enlarged view of the cooperation between the second discontinuous structure of the first recessed portion of the utility model and the iron core.

[0033] Fig.10 This is the third discontinuous structure of the first recessed portion of the utility model.

[0034] Fig.11 is Fig.10 In the direction indicated by the dotted arrow, Fig.10 An enlarged view of the armature and core cooperation is shown.

[0035] Fig.12 It is a bottom view of the armature of Example 1 of the utility model.

[0036] Fig.13 It is a side view of the armature of Example 1 of the utility model.

[0037] Fig.14 yes Fig.13 A partial enlarged view of C.

[0038] Fig.15 It is a cross-sectional view of Example 1 of the utility model when the iron core has a coating.

[0039] Fig.16 yes Fig.15 A partial enlarged view of D.

[0040] Fig.17 It is a three-dimensional diagram of the armature of Example 2 of the present utility model.

[0041] Fig.18 yes Fig.17 A partial enlarged view of E.

[0042] Fig.19 It is a structural schematic diagram of the coordination between the armature and the iron core of Example 3 of the utility model.

[0043] Fig. 20 It is a bottom view of the armature structure of Example 3 of the utility model.

[0044] Fig.21 It is a side view of the armature structure of Example 3 of the utility model.

[0045] Wherein: 1 base, 11 iron core, 110 iron core pole surface, 111 coating, 12 moving spring pin, 13 static spring pin, 14 coil pin, 15 static contact, 2 moving component, 21 armature, 210 armature pole surface, 211 first end, 212 second end, 213 first recessed portion, 2130 positioning surface, 214 second recessed portion, 215 third recessed portion, 22 moving spring sheet, 221 moving contact, 23 injection molded part. DETAILED DESCRIPTION

[0046] To further illustrate each embodiment, the utility model provides drawings. These drawings are part of the disclosure of the utility model, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant description of the specification to explain the operating principle of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and the advantages of the utility model. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components. In the description of this specification, the terms "first", "second", and "third" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance; the term "multiple" refers to two or more, unless otherwise clearly defined. In the description of this specification, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "back", etc. are based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the embodiments of the invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the embodiments of the invention. In the description of this specification, the description of the terms "one embodiment", "other embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0047] Example 1

[0048] See also Figure 3 to Figure 4As shown, the utility model discloses a switching device, which is a relay, and includes a base 1 and a moving part 2. An iron core 11 with a coil wound therein is provided in the base 1, and the base 1 is also provided with a moving spring pin 12, a static spring pin 13 and a coil pin 14 extending to the outside thereof. The moving part 2 is arranged on the base 1, and includes an armature 21 and a moving spring piece 22, and the armature 21 and the moving spring piece 22 are fixedly connected by an injection molded part 23. The armature 21 is defined as having a length direction X in the direction from the middle toward one end of the core pole surface 110, and a direction perpendicular to the armature 21 on the extension plane is defined as a width direction Y, wherein the extension plane of the armature 21 refers to the extension plane of the body of the armature 21. In this example, the moving part 2 is a seesaw-like symmetrical structure, the armature 21 is a flat and long strip structure, the length of which is greater than the width and height, and the two ends of the armature 21 in the length direction of the armature 21 include a first end 211 and a second end 212, the iron core 11 protrudes from the base 1 corresponding to the first end 211 and the second end 212, the armature 21 rotates with the midpoint between the first end 211 and the second end 212 as a fulcrum to approach the iron core 11 or move away from the iron core 11, thereby driving the entire moving part 1 to rotate synchronously, and its movement mode is similar to a seesaw. The moving spring 22 extends a certain length to both ends of the armature 21, and a moving contact 221 is set at the end of the moving spring 22. The moving spring 22 moves with the armature 21 so that the moving contact at one end of the armature 21 contacts the corresponding static contact 15 on the base 1, and the moving contact at the other end of the armature 21 is disconnected from the corresponding static contact 15 on the base 1.

[0049] See also Figures 4 to 6As shown, the armature 21 selectively attracts or disconnects with the core 11 under the action of magnetic attraction relative to the core 11, so that the armature 21 forms an armature pole face 210 facing the core 11, and the core 11 forms an iron core pole face 110 facing the armature 21. The first end 211 and the second end 212 of the armature 21 are provided with a first recessed portion 213 within the adsorption range of the armature pole face 210, thereby increasing the air gap between the armature pole face 210 and the iron core pole face 110, thereby reducing the magnetic attraction force when the armature 21 and the iron core 11 are attracted. The first recessed portion 213 is a discontinuous structure within the adsorption range of the iron core pole face 110 along the length direction X. The discontinuous structure of the first recessed portion 213 enables the adsorption contact area between the end of the armature 21 and the iron core pole face 110 to be linearly and fully covered along the width direction Y of the armature 21. The adsorption range of the core pole surface 110 refers to the projection range of the armature 21 on the core pole surface 110. Within the projection range, the core pole surface 110 and the armature pole surface 210 face each other and can form a magnetic attraction. Among them, the adsorption contact area is the area within the adsorption range of the core pole surface 110 where the core 11 and the armature 21 form contact under the action of the magnetic attraction. In the area outside the adsorption contact area within the adsorption range, the core 11 and the armature 21 have a certain gap, and the magnetic lines of force generated by the coil can pass through the gap to form a magnetic attraction between the core 11 and the armature 21.

[0050] Within the adsorption range of the armature pole surface 210, the end of the armature 21 and the core pole surface 110 can form an adsorption contact area between the two under the action of magnetic attraction, and the first recessed portion 213 is configured as follows: the surface of the end of the armature 21 corresponds to the adsorption range of the core pole surface 110, and there is a recess that does not make contact with the core pole surface 110, and the recess is interrupted and not completely connected within the adsorption range of the entire core pole surface 110 along the length direction X, thereby forming a discontinuous structure. As a further preferred structure, the adsorption contact area is a line segment extending along the width direction, so that the armature pole surface 210 and the core pole surface 110 form a line contact. The discontinuous structure of the first recessed portion 213 within the adsorption range of the core pole surface 110 can be Figures 7 to 11 In any structure shown in the figure, the solid line frame represents the adsorption range of the core pole surface 110, wherein the portion filled with oblique lines is the range that may form the adsorption contact area, and the portion outside the filled oblique lines is the first recessed portion 213. Figures 7 to 11 It can be seen that the first recessed portion 213 can be arranged on one side of the adsorption contact area ( Figure 7 ) or both sides ( Figure 8 and Fig. 9 ) or the middle ( Fig.10 and Fig.11 ), and the first recessed portion 213 may be extended from one end to the other end along the width direction of the armature 21 ( Figure 7 , Figure 8), and there may be a distance ( Fig.10 ), the first recessed portion 213 of this example adopts Figure 7 The structure shown is specifically arranged on one side of the adsorption contact area and extends from one end to the other end along the width direction of the armature 21. Figures 7 to 9 In the embodiment shown, the first recessed portion 213 extends from one end of the armature 21 to the other end along the width direction of the armature 21. The starting position of the first recessed portion 213 enables the adsorption contact area to form a line segment extending along the width direction, so that the adsorption contact between the armature pole surface 210 and the core pole surface 110 forms a line contact ( Figure 7 ), thereby reducing the contact area between the armature pole surface 210 and the core pole surface 110, increasing the air gap, and improving the response speed of the relay; by controlling the starting position of the first recessed portion 213, the adsorption contact area can also be formed into a plane with a smaller area ( Figure 8 , Fig. 9 ), thereby reducing the contact area between the armature pole surface 210 and the core pole surface 110, increasing the air gap, and improving the response speed of the relay. Fig.10 and Fig.11 In the embodiment, since there is a certain distance between the first recessed portion 213 and both ends of the armature 21 in the width direction, the armature pole faces 210 on both sides of the first recessed portion 213 are still in contact with the core pole face 110. The armature pole face 210 and the core pole face 110 of this embodiment are in surface contact. However, due to the presence of the first recessed portion 213, the contact area between the armature pole face 210 and the core pole face 110 is smaller than that of the prior art, which can also increase the air gap and improve the response speed of the relay. Figures 7 to 11 The first recessed portions 210 shown are all structures extending from one end to the middle of the adsorption range along the length direction. In addition, the first recessed portions 210 can also be arranged in the middle of the adsorption range along the length direction, such as forming a "Z" shape or multiple spaced recessed points (similar to pockmarks) in the armature pole surface 210, thereby reducing the contact area between the armature pole surface 210 and the core pole surface 110.

[0051] See also Figure 5 and Figure 12 to Figure 14As shown, in this example, the adsorption contact between the core pole face 110 and the armature pole face 210 is similar to line contact to reduce the adsorption area, thereby achieving the purpose of increasing the air gap to improve the response speed, and the contact line extends along the width direction of the armature 21. In the prior art, there is a method in which the two ends in the width direction of the armature are flattened into inclined planes, thereby forming a thicker middle area in the middle, and the middle area is a plane. In order to reduce the contact area between the core pole face and the armature pole face, the width of the two inclined planes can be controlled to make the two inclined planes intersect, thereby forming a sharp angle extending along the length direction of the armature, and the tip of the sharp angle is used to form a line contact with the core 11, but this contact line extends in a direction perpendicular to the rotation axis of the action part. For the seesaw-type armature disclosed in this example, this method of flattening both sides in the width direction of the armature has very high requirements for processing accuracy. If the processing accuracy is insufficient, it may become a point-to-face contact. At this time, the suction force between the armature 21 and the core 11 is small, which is not conducive to the attraction of the relay. Therefore, the utility model has a lower requirement for manufacturing precision along the width direction of the armature (ie, the rotation axis direction or the contact direction of the actuating component), a simple process and low production difficulty.

[0052] When the armature 21 and the iron core 11 are attracted, the angle between the armature pole surface 210 and the iron core pole surface 110 is the contact angle A. Figure 5 As shown, the armature 21 with the first recess 213 of the utility model has the following advantages: at the same contact position and contact angle A, the contact area between the armature pole face 210 and the core pole face 110 of the utility model is small, thereby increasing the air gap between the armature pole face 210 and the core pole face 110, so that the magnetic attraction between the core 11 and the armature 21 is smaller when the core 11 and the armature 21 are in a closed state, and when the core 11 and the armature 21 are converted from closed to disconnected, the resistance to be overcome is smaller, thereby shortening the disconnection time and improving the response speed of the relay.

[0053] In this example, the first recessed portion 213 is an inclined surface formed by flattening the armature pole surface 210, and the inclined surface penetrates the armature 21 along the width direction of the armature 21, so as to form a contact area at the end of the flattened position. In other embodiments, the first recessed portion 213 can also be formed by turning. The first recessed portion 213 is an inclined surface, which can be formed by flattening once, and the operation is simple and the forming efficiency is high. In addition to the inclined surface, the first recessed portion 213 can also be a plane or an arc surface, or even a plurality of intersecting planes.

[0054] The flattened area can be inclined from the armature pole surface 210, so that the contact area and the inclined surface form an angle, or the flattening force can be further increased to form a step structure on the armature pole surface 210. In this example, the step structure is formed. The projection of the boundary between the flattened area and the contact area (the boundary forms a step structure in this example) on the plane where the core pole surface is located is located within the core pole surface 110, thereby ensuring that the contact area forms a reliable contact with the core pole surface 110.

[0055] See also Figure 6 , Figure 12 to Figure 14 As shown, the step forms a visible and obvious dividing line on the armature pole surface 210, which helps to measure the key dimensions of parts or assembled components, and can also be used for assembly positioning of parts and components, and improve the consistency of the armature pole surface contact position and the assembly accuracy.

[0056] See also Figure 6 , Figure 12 to Figure 14 As shown, in this example, the first recessed portion 213 is an inclined surface provided on the armature pole surface 210, and the inclined surface penetrates the armature 21 along the width direction of the armature 21, thereby forming a step structure extending along the width direction of the armature 21. Fig.10 As shown, in other embodiments, the first recessed portion 213 may be narrower in the width direction of the armature 21 and does not penetrate the inclined surface of the armature 21, that is, the first recessed portion 210 is formed in the middle area of ​​the armature 21, and the side walls of the first recessed portion 213 are at a certain distance from the two sides of the armature 21. In order to maintain the force balance in the width direction of the armature 21, the central axis of the first recessed portion 213 should coincide with the central axis of the armature 21. Compared with the structure in which the first recessed portion 213 is only provided in the middle area of ​​the armature 21, the structure in which the first recessed portion 213 penetrates the width direction of the armature 21 can form a larger positioning surface and a longer step, which is more conducive to the assembly positioning and measurement of parts, and can also ensure that the magnetic attraction between the iron core 11 and the armature 21 is small, thereby effectively improving the response speed of the relay.

[0057] See also Figure 15 to Figure 16As shown, in one embodiment, the iron core is made of pure iron material with strong magnetic conductivity, and a coating 111 is arranged on the surface of the iron core to prevent the iron core substrate from oxidizing and rusting. The coating material is a magnetically conductive high-insulating organic material, and the armature pole face 210 is attracted to the iron core 11 by contacting the coating 111. At present, the more commonly used coating material in the industry is nickel. As a coating material, it is not conducive to the insulation performance between the strong and weak currents of the relay, while the magnetically conductive high-insulating organic material has good insulation performance, which can improve the insulation performance between the strong and weak currents of the relay without affecting the magnetic permeability. However, since this material is a kind of organic plastic, its surface will be softer than metal nickel. When the relay is repeatedly hit or in a high temperature environment (the organic material will be softer at room temperature at high temperature), the degree of fit between the armature and the iron core pole face coating material will become higher and higher. When they are closely fitted, it is very easy to form a vacuum negative pressure between the two. Once the vacuum negative pressure is formed, it is difficult to separate them (such as the vacuum suction cup widely used in life), which will increase the resistance when the relay is actuated, which is not conducive to the reliable disconnection of the armature. The first recessed portion 213 can also greatly reduce the contact area between the armature pole surface 210 and the coating 111 on the surface of the core 11, thereby reducing the area of ​​the vacuum negative pressure formed between the armature pole surface 210 and the core coating 111, and finally achieving the effect of reducing resistance, overcoming the defect of the coating 111 made of organic plastic that increases the resistance when the relay is actuated. The reduced resistance brought by the vacuum negative pressure is conducive to the reliable disconnection of the armature 21 and the core 11 under the same coil suction force, and finally makes the relay actuate more quickly.

[0058] In this example, the first recessed portion 213 is provided at both ends of the armature 21 along the length direction. In other embodiments, the first recessed portion 213 may be provided only at the first end 211 or the second end 212 of the armature 21 along the length direction.

[0059] Example 2

[0060] See also Figure 17 to Figure 18As shown, the difference between this example and Example 1 is that: the two ends of the armature 21 are further provided with second recessed portions 214, the second recessed portions 214 are also located on the armature pole surface 210, and the second recessed portions 214 are farther from the end of the armature 21 than the first recessed portions 213, more specifically, the first recessed portions 213 and the second recessed portions 214 are respectively located on both sides of the contact area and intersect in the contact area. In this example, the second recessed portions 214 are a plurality of narrow grooves arranged at intervals, and each second recessed portion 214 extends along the length direction of the armature 21, and is symmetrically arranged along the width direction of the armature 21, and the axis of symmetry coincides with the central axis of the armature 21, such an arrangement makes the force on the width direction of the armature 21 balanced, and prevents the armature 21 from deviating to one side in the width direction due to uneven force. In other embodiments, by changing the structure and position of the second recessed portion 214, the second recessed portion 214 is not limited to extending along the length direction of the armature 21, and it can also be arranged asymmetrically in the width direction of the armature, but attention should be paid to the force balance of the armature 21 in the width direction. In addition, in other embodiments, the second recessed portion 214 is not limited to being composed of multiple narrow grooves, and can also be a wider recessed portion. In addition, one end of the second recessed portion 214 is located in the contact area, so in the width direction, the line contact of the contact area is divided, thereby further reducing the contact area between the armature pole face 210 and the core pole face 110.

[0061] See also Fig.18 As shown, in this example, the second recessed portion 214 is an arc-shaped recessed portion, and more specifically, the cross-sectional shape of the second recessed portion 214 is an arc-shaped. In other embodiments, the cross-sectional shape of the second recessed portion can also be a polygon such as a rhombus or a triangle, so that the second recessed portion forms a polygonal recessed portion, and the specific shape of the polygon can be any shape that can increase the air gap between the armature pole surface 210 and the core pole surface 110. The second recessed portion 214 can be formed by partially flattening or by turning.

[0062] On the basis of the first recess 213, a second recess 214 is provided on the armature pole surface 210, which can also reduce the contact area between the armature pole surface 210 and the core pole surface 110, thereby increasing the air gap between the armature pole surface 210 and the core pole surface 110 and reducing the vacuum negative pressure area, further reducing the magnetic attraction and vacuum negative pressure attraction between the core 11 and the armature 21, and further improving the response speed of the relay.

[0063] In this example, both ends of the armature 21 are provided with a first recessed portion 213 and a second recessed portion 214, that is, the first end 211 of the armature 21 is provided with a first recessed portion 213 and a second recessed portion 214, and the second end 212 of the armature 21 is also provided with a first recessed portion 213 and a second recessed portion 214. In other embodiments, based on Embodiment 1, the second recessed portion 214 may be provided only at the first end 211 or the second end 212 of the armature 21.

[0064] Example 3

[0065] See also Figures 19 to 21 As shown, the difference between this example and Example 1 is that the armature 21 is an asymmetric structure, and the first recessed portion 213 and the third recessed portion 215 are provided at the normally closed end of the armature 21, while only the third recessed portion 215 is provided at the normally open end of the armature 21. The third recessed portion 215 is formed by further flattening the armature pole surface 210, and the starting end of the third recessed portion 215 forms another step structure on the armature pole surface 210, and the step structure formed by the third recessed portion 215 is outside the projection range of the core pole surface 110, so that the stroke of the armature 21 can be increased within a limited space, thereby improving the contact gap of the relay and the withstand voltage between the disconnected contacts. The first recessed portion 213 is a transition slope provided on the third recessed portion 215, that is, the third recessed portion 215 is first processed to form the third recessed portion 215, and then the slope end of the third recessed portion 215 is further processed to form the first recessed portion 213. The third recessed portion 215 in this example is an inclined surface extending from one end of the armature 21 to the other end along the width direction Y of the armature 21 . In other embodiments, the third recessed portion 215 may also be an arcuate surface.

[0066] The first recessed portion 213 is disposed at the normally closed end, which can reduce the contact area between the armature pole surface 210 and the core pole surface 110 at the normally closed end, thereby reducing the suction force at the end and improving the response speed.

[0067] The moving part 2 is not limited to the seesaw-like symmetrical structure described in the above embodiments, but can also be a snap-fit ​​structure. Correspondingly, the armature 21 is not limited to the above-mentioned long strip structure, but can also be a square structure, and its movement mode can be not only the above-mentioned seesaw-like movement, but also the overall movement towards or away from the iron core.

[0068] In addition, the moving parts 2 of the above-mentioned embodiments can also be applied to other different types of switching electrical appliances. The switching electrical appliances refer to the switching electrical appliances with terms and definitions in GB / T 5226.1-2019 / IEC 60204-1:2016, that is, electrical appliances used to connect or disconnect one or more circuit currents. In addition to the relays of the above-mentioned embodiments, the specific component forms can also be circuit breakers, contactors, disconnectors, etc. Since such switching electrical appliances contain the above-mentioned moving parts, they also have their corresponding beneficial technical effects, which will not be repeated here.

[0069] Although the present invention is specifically demonstrated and described in conjunction with the preferred embodiments, those skilled in the art should understand that the remaining undescribed portions are prior art, and that various changes made to the present invention in form and detail without departing from the spirit and scope of the present invention as defined in the appended claims shall fall within the scope of protection of the present invention.

Claims

1. A switch device, comprising a base and a moving part, wherein the base comprises an iron core wound with a coil, and the moving part comprises an armature, wherein the armature is selectively attracted to or disconnected from the iron core under the action of a magnetic attraction relative to the iron core, so that the armature forms an armature pole surface facing the iron core, and the iron core forms an iron core pole surface facing the armature, characterized in that: The armature is defined as having a length direction from the middle toward one end of the core pole surface, and a width direction perpendicular to it on the extension plane of the armature. At least one end of the armature along its length direction is provided with a first recessed portion within the adsorption range of the armature pole surface. The first recessed portion is a discontinuous structure along the length direction within the adsorption range of the core pole surface. The discontinuous structure of the first recessed portion enables the adsorption contact area between the end of the armature and the core pole surface to be linearly and fully covered along the width direction of the armature.

2. A switch device according to claim 1, characterized in that: Within the adsorption range of the armature pole surface, the end of the armature and the core pole surface can form the adsorption contact area between the two under the action of magnetic attraction, and the first recessed portion is configured as follows: a recess that does not contact the core pole surface is provided on the surface of the end of the armature corresponding to the adsorption range of the core pole surface, and the recess is interrupted and not completely connected along the length direction within the adsorption range of the entire core pole surface, thereby forming the discontinuous structure.

3. A switch device according to claim 1, characterized in that: The adsorption contact area is a line segment extending along the width direction.

4. A switch device according to claim 3, characterized in that: The first recessed portion is an inclined surface formed by machining the armature pole surface, the inclined surface extends from one end of the armature to the other end along the width direction of the armature, and the adsorption contact area is formed at the end area of ​​the inclined surface.

5. A switch device according to claim 1, characterized in that: The first recessed portion causes the armature pole surface to form a step structure, and the projection of the step structure on the plane where the core pole surface is located is located within the core pole surface.

6. A switch device according to claim 1, characterized in that: The armature is further provided with a second recessed portion, which is located on the armature pole surface and is farther from the end of the armature than the first recessed portion.

7. A switch device according to claim 6, characterized in that: The second recessed portion is a plurality of narrow grooves arranged at intervals.

8. A switch device according to claim 7, characterized in that: The armature is a flat and long strip structure, the length of which is greater than the width and height, and the second recessed portion extends along the length direction of the armature.

9. A switch device according to claim 6, characterized in that: The cross-sectional shape of the second recessed portion is an arc shape or a polygonal shape, so that the second recessed portion forms an arc-shaped recessed portion or a polygonal recessed portion accordingly.

10. A switch device according to claim 1, characterized in that: The two ends of the armature are provided with third recessed parts, the third recessed parts are located on the armature pole surface, the normally closed end of the armature is provided with the first recessed part, and the first recessed part is formed in the third recessed part.

11. A switch device according to claim 1, characterized in that: The iron core is provided with a coating made of organic plastic on the outside, and the armature pole surface is attracted to the iron core by contacting the coating.

12. A switch device according to any one of claims 1 to 11, characterized in that: The moving part is a seesaw-like symmetrical structure.

13. A switch device according to claim 12, characterized in that: The switching device is a relay.

Images