Moving contact structure and switching device

Abstract

The utility model provides a moving contact structure and a switching device, and relates to the technical field of electrical equipment. The utility model provides a moving contact structure. The moving contact structure comprises a support and a plurality of contact pieces. The contact piece is used for contacting with or separating from the static contact structure. The plurality of contact pieces are installed on the support, and the size of part of the plurality of contact pieces is larger than the size of the other part of contact pieces. Wherein the support is provided with a contact piece groove, and part of the plurality of contact pieces are embedded in the contact piece groove. Therefore, when the moving contact structure and the static contact structure are switched from contact to separation, electric arc can be concentrated at the part of the contact piece with larger size, the electric arc can enter the arc extinguishing device, and the breaking capacity and the performance of the switching device can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical equipment, in particular to a moving contact structure and a switching device. BACKGROUND

[0002] The switching device is a kind of electrical appliance that can connect or cut off the main circuit, generally includes a moving contact and a static contact, the moving contact can realize the connection or separation of the moving contact and the static contact based on electromagnetic, pneumatic, mechanical transmission and other principles, thereby controlling the on-off of the main circuit.

[0003] In the related art, the structure of the moving contact is not reasonable enough, so that the breaking capacity of the switching device is low, which affects the performance of the switching device. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a moving contact structure and a switching device, which can improve the breaking capacity of the switching device with the moving contact structure, so that the performance of the switching device is better.

[0005] In the first aspect, the present application provides a moving contact structure applied to a switching device, the moving contact structure is used to cooperate with a static contact structure. The moving contact structure includes a bracket and a plurality of contact pieces. The contact pieces are used to contact or separate from the static contact structure. The plurality of contact pieces are installed on the bracket, and the sizes of part of the contact pieces are larger than those of the other contact pieces. The bracket is provided with a contact piece groove, and part of the contact pieces are embedded in the contact piece groove.

[0006] In the embodiment of the present application, the moving contact structure includes a plurality of contact pieces with different sizes. When the moving contact structure and the static contact structure are switched from contact to separation, the arc can be concentrated at the contact pieces with larger sizes, which is beneficial to the arc entering the arc extinguishing device, thereby improving the breaking capacity and performance of the switching device.

[0007] Optionally, the bracket includes a mounting plate, a first side plate and a second side plate, the first side plate and the second side plate are connected on both sides of the mounting plate, and the first side plate and the second side plate are oppositely arranged. The plurality of contact pieces are arranged along the direction from the first side plate to the second side plate. The moving contact structure further includes an elastic member, the elastic member is arranged between the contact pieces and the mounting plate, and the plurality of contact pieces can rotate relative to the mounting plate. The contact piece groove is arranged on the mounting plate.

[0008] Through the above arrangement, in the process of using the moving contact structure to switch the contact pieces from contact to separation with the static contact structure, the contact pieces embedded in the contact piece groove can be separated from the static contact structure later than the other contact pieces. Therefore, the arc generated by the separation of the moving contact structure and the static contact structure will be concentrated to the contact pieces embedded in the contact piece groove, which is more beneficial to the concentration of the arc, thereby improving the breaking capacity of the switching device.

[0009] Optionally, the contact slot has a first slot wall close to the first side plate, and the sizes of the plurality of contacts gradually increase in a direction from the first side plate to the second side plate between the first slot wall and the first side plate.

[0010] Through the above arrangement, the plurality of contacts are distributed in a gradient between the first slot wall and the first side plate. In this way, when the current is broken, the arc will be more concentrated on the contacts embedded in the contact slot, which makes the arc more easily enter the arc extinguishing device, and thus the arc can be extinguished faster.

[0011] Optionally, the sizes of some of the contacts are the same between the first slot wall and the first side plate.

[0012] In this way, the types of contacts in the movable contact structure can be reduced, i.e. the same type of contact is used more, which can reduce the production cost of the plurality of contacts.

[0013] Optionally, the contact slot has a second slot wall close to the second side plate, and the sizes of the plurality of contacts gradually increase in a direction from the second side plate to the first side plate between the second slot wall and the second side plate.

[0014] Through the above arrangement, the plurality of contacts are distributed in a gradient between the second slot wall and the second side plate. In this way, when the current is broken, the arc will be more concentrated on the contacts embedded in the contact slot, which makes the arc more easily enter the arc extinguishing device, and thus the arc can be extinguished faster.

[0015] Optionally, the sizes of some of the contacts are the same between the second slot wall and the second side plate.

[0016] In this way, the types of contacts in the movable contact structure can be reduced, i.e. the same type of contact is used more, which can reduce the production cost of the plurality of contacts.

[0017] Optionally, the movable contact structure further comprises a rotating shaft and a contact point, the rotating holes and the mounting slots are arranged on the contacts in an interval, the rotating shaft passes through the rotating holes of the first side plate, the second side plate and the plurality of contacts, the contact point is arranged in the mounting slot, and the contact can contact the static contact structure through the contact point. On the side of the contact away from the rotating hole, the part of the contact towards the static contact structure is a circular arc structure, so as to guide the arc generated when the contact separates from the static contact structure.

[0018] In this way, the circular arc structure can guide the arc generated when the contact separates from the static contact structure, so that the arc can flow along the circular arc structure, which facilitates the arc to enter the arc extinguishing device as soon as possible after being generated, and reduces the possibility of damage to other components in the switch device caused by the arc flowing in other directions.

[0019] Optionally, on the side of the contact away from the rotating hole, the part of the contact towards the static contact structure smoothly transitions to the contact point.

[0020] Thus, after the arc is generated, the arc can flow along the smooth transition surface of the section of the contact piece, reducing the arc residence time at the contact point, thereby reducing the possibility of arc burning the contact point, and improving the service life and reliability of the movable contact structure.

[0021] Optionally, the mounting groove has intersecting first and second inner walls, and the contact point is welded to both the first and second inner walls.

[0022] Thus, the contact area of the contact point welded to the contact piece can be increased. This can reduce the contact resistance between the contact point and the contact piece, thereby reducing the temperature rise during operation of the movable contact structure and improving the performance of the switch device.

[0023] In a second aspect, the application provides a switch device comprising the movable contact structure of any one of the first aspect.

[0024] The switch device provided in the second aspect and the possible designs of the second aspect has the advantages of the first aspect and the possible designs of the first aspect, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 FIG. 1 is a schematic view of a switch device according to an embodiment of the application.

[0026] Figure 2 FIG. 2 is a schematic view of a movable contact structure according to an embodiment of the application.

[0027] Figure 3 FIG. 3 is a schematic view of a contact piece according to an embodiment of the application.

[0028] Figure 4 FIG. 4 is a schematic view of a bracket according to an embodiment of the application.

[0029] Figure 5 FIG. 5 is a sectional view of a movable contact structure according to an embodiment of the application.

[0030] Figure 6 FIG. 6 is an exploded view of a movable contact structure according to an embodiment of the application.

[0031] REFERENCE SIGNS:

[0032] 100: moving contact structure; 10: contact patch; 11: rotating hole; 12: mounting groove; 121: first inner wall; 122: second inner wall; 101: first side; 102: second side; 103: preset contact patch; 104: limiting block; 20: support; 201: contact patch groove; 21: mounting plate; 22: first side plate; 23: second side plate; 2011: first groove wall; 2012: second groove wall; 30: elastic member; 40: rotating shaft; 50: contact; 60: circular arc structure; 70: connecting rod; 80: contact support; 200: switch device; 210: stationary contact structure. DETAILED DESCRIPTION

[0033] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the terms "comprising," "comprises" and "including" as used herein are synonymous with and meant to have the same meaning as the term "including"; the term "including" as used herein is meant to be equivalent to the term "comprising" and is used in the same way.

[0035] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that any of the features, structures, or characteristics described in connection with an embodiment can be included in a different embodiment.

[0036] The term "and / or", as used herein, merely describes association between associated objects, and can mean that three relationships exist, for example, A and / or B can mean that A exists, A and B exist, and B exists. In addition, the character " / " herein generally means that the front and rear associated objects are in an "or" relationship.

[0037] The positional words appearing in the following description are the directions shown in the drawings, and are not intended to limit the specific structure of the present application. For example, in the description of the present application, the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only intended to facilitate the description of the present application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0038] In addition, the terms "first", "second", and the like in the description and claims of the present application or the above drawings are used to distinguish different objects, and are not intended to describe a particular order, and can explicitly or implicitly include one or more of the features.

[0039] In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more (including two), and similarly, "a plurality of groups" means two or more groups (including two groups).

[0040] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, the "connection" or "connection" of the mechanical structure can mean a physical connection, for example, the physical connection can be a fixed connection, for example, a fixed connection through a spacer, for example, a fixed connection through a screw, bolt or other spacer; the physical connection can also be a detachable connection, for example, a mutual clamping or clamping connection; the physical connection can also be integrally connected, for example, welded, bonded or integrally formed to form a connection for connection. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. The "connection" or "connection" of the circuit structure can mean not only a physical connection, but also an electrical connection or a signal connection, for example, it can be a direct connection, that is, a physical connection, or it can be indirectly connected through at least one intermediate element, as long as the circuit is connected, it can also be the internal connection of two elements; signal connection can not only be signal connection through a circuit, but also signal connection through a medium medium, for example, radio waves. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] It should be appreciated that every feature described in this specification (including any accompanying claims, abstract and drawings) is implemented in at least one embodiment. That is, unless otherwise specified, the description of a particular feature in the specification (including any accompanying claims, abstract and drawings) includes structural and / or functional equivalents thereof. Thus, it is not intended that any aspect of the specification (including any accompanying claims, abstract and drawings) be construed as being limited to a single embodiment.

[0042] As shown in Figure 1 An embodiment of the present application provides a switch device 200, which comprises a movable contact structure 100.

[0043] The switch device 200 is connected in a circuit and can control the on-off of the circuit. The switch device 200 further comprises a stationary contact structure 210. The movable contact structure 100 can be in contact with the stationary contact structure 210, so that a path is formed between the movable contact structure 100 and the stationary contact structure 210 to turn on the circuit.

[0044] Alternatively, the movable contact structure 100 can be separated from the stationary contact structure 210, so that a path is formed between the movable contact structure 100 and the stationary contact structure 210 to turn off the circuit.

[0045] In addition, the switch device 200 is provided with an arc extinguishing device, which can be opposite to the stationary contact structure 210. When the movable contact structure 100 is switched from contact to separation with the stationary contact structure 210, an arc can be generated between the movable contact structure 100 and the stationary contact structure 210. The arc can enter the arc extinguishing device so that the arc can be extinguished, reducing the possibility of arc damage to the switch device 200.

[0046] In the switch device 200 provided with the movable contact structure 100 of the present application, when an arc is generated, the arrangement of the movable contact structure 100 can make the arc more concentrated, facilitating the arc to enter the arc extinguishing device, reducing the possibility of the arc being more dispersed and not easily entering the arc extinguishing device, so that the arc extinguishing device can have a better extinguishing effect on the arc.

[0047] The movable contact structure 100 provided by an embodiment of the present application will be described in detail below with reference to the drawings.

[0048] Referring to Figure 1 and Figure 2 The movable contact structure 100 comprises a support 20 and a plurality of contact pieces 10. The contact pieces 10 are used to contact or separate from the stationary contact structure 210. The plurality of contact pieces 10 are mounted on the support 20. The sizes of some of the plurality of contact pieces 10 are greater than those of the other contact pieces 10. The support 20 is provided with a contact piece groove 201, and some of the plurality of contact pieces 10 are embedded in the contact piece groove 201.

[0049] In this application, the moving contact structure 100 includes a bracket 20 and multiple contact pieces 10. The bracket 20 supports the multiple contact pieces 10, enabling the contact pieces 10 to operate stably. Each of the multiple contact pieces 10 can actuate to cooperate with the stationary contact structure 210 to achieve the closing or opening of the switching device 200.

[0050] In this embodiment, at least some of the multiple contact pieces 10 may have different sizes, that is, some of the contact pieces 10 are larger than the other contact pieces 10. Thus, when the moving contact structure 100 and the stationary contact structure 210 are connected, causing current to flow in the switching device 200, when the switching device 200 is opened, causing the moving contact structure 100 and the stationary contact structure 210 to separate, the electric arc generated between the moving contact structure 100 and the stationary contact structure 210 will concentrate at the larger contact piece 10.

[0051] Therefore, when the switching device 200 equipped with the moving contact structure 100 proposed in this application is opened, the electric arc generated will be concentrated, which is conducive to the electric arc entering the arc extinguishing device, so that the arc extinguishing device can have a better arc extinguishing effect, thereby improving the breaking capacity and performance of the switching device 200.

[0052] In addition, in this embodiment, the bracket 20 is also provided with a contact groove 201, in which some of the contacts 10 can be embedded. The contact groove 201 facilitates the positioning and installation of some or all of the multiple contacts 10, which can reduce the possibility of multiple contacts 10 being difficult to position when installing, thus making the assembly of the moving contact structure 100 more difficult.

[0053] In summary, in the embodiments of this application, the moving contact structure 100 includes multiple contact pieces 10 with different sizes. When the moving contact structure 100 and the stationary contact structure 210 switch from contact to separation, the electric arc can be concentrated at the larger part of the contact piece 10, which is conducive to the electric arc entering the arc extinguishing device, thereby improving the breaking capacity and performance of the switching device 200.

[0054] In this application, the contact 10 embedded in the contact slot 201 can be a larger contact 10, or a smaller contact 10, or multiple contact 10s can be embedded in the contact slot 201, etc. Regardless of the arrangement, it is convenient to install multiple contact 10s.

[0055] It should be noted that, generally speaking, an arc-extinguishing device includes multiple grid plates, which are typically U-shaped structures with the center of the grid plate being more concave than the sides. When an electric arc enters the arc-extinguishing device, the concave portion in the center of the grid plate can more effectively divide the arc, resulting in a better arc extinguishing effect.

[0056] In the present application, the larger size of the plurality of contact pieces 10 can be opposite to the middle part of the grid piece. In this way, after the arc is generated, the concentrated arc can be opposite to the middle part of the contact piece 10, so that more arc can reach the middle part of the grid piece, improve the extinguishing effect of the arc, and thus the breaking capacity of the switch device 200 can be improved.

[0057] Among them, the contact piece 10 opposite to the middle part of the grid piece can be 1-3 pieces, and the size of the 1-3 pieces of contact pieces 10 is larger than the size of the other contact pieces 10. In the present application, the size of the 1-3 pieces of contact pieces 10 opposite to the middle part of the grid piece can be the same.

[0058] Alternatively, the size of the 1-3 pieces of contact pieces 10 opposite to the middle part of the grid piece can also be different. For example, when the number of the 1-3 pieces of contact pieces 10 opposite to the middle part of the grid piece is 3, the size of the contact piece 10 in the middle can be larger than the size of the contact pieces 10 on both sides, and the size of the contact pieces 10 on both sides can be consistent, and the like.

[0059] It should be further pointed out that, in the embodiments of the present application, as shown in Figure 1 , Figure 2 and Figure 3 , the contact piece 10 is provided with a contact point 50, and the contact piece 10 can cooperate with the static contact structure 210 through the contact point 50. On the side of the contact piece 10 facing the static contact structure 210, the position of the contact piece 10 facing the arc extinguishing device can form an arc contact, and the arc contact can guide the arc, so as to facilitate the arc to enter the arc extinguishing device after being generated.

[0060] In the present application, for the contact pieces 10 of different sizes, the size difference between the plurality of contact pieces 10 mainly exists in the arc contact, that is, the size of the arc contact of the larger size of the contact piece 10 is larger. In this way, the larger size of the contact piece 10 has a better guiding effect on the arc, and thus it is more conducive for the arc to enter the arc extinguishing device.

[0061] In some embodiments, as shown in Figure 2 , Figure 4 and Figure 5 , the bracket 20 can include a mounting plate 21, a first side plate 22 and a second side plate 23, the first side plate 22 and the second side plate 23 are connected on both sides of the mounting plate 21, and the first side plate 22 and the second side plate 23 are oppositely arranged. The plurality of contact pieces 10 are arranged along the direction from the first side plate 22 to the second side plate 23, and the movable contact structure 100 further includes a resilient member 30, the resilient member 30 is arranged between the contact piece 10 and the mounting plate 21, and the plurality of contact pieces 10 can rotate relative to the mounting plate 21. Among them, the contact piece groove 201 is arranged on the mounting plate 21.

[0062] In this embodiment, the bracket 20 specifically includes a mounting plate 21, a first side plate 22, and a second side plate 23, which can be connected to each other on both sides of the mounting plate 21. Thus, a space for mounting the contact piece 10 can be formed between the first side plate 22, the second side plate 23, and the mounting plate 21.

[0063] Multiple contact pieces 10 can be installed along the direction from the first side plate 22 to the second side plate 23. In this way, all multiple contact pieces 10 can be opposite to the mounting plate 21.

[0064] In this application, the moving contact structure 100 also includes an elastic element 30, which can be disposed between the mounting plate 21 and the contact piece 10. The elastic element 30 and the bracket 20 can cooperate to support the contact piece 10.

[0065] like Figure 2 and Figure 5 As shown, the contact piece 10 may have a first side 101 and a second side 102 opposite to each other. The direction from the first side 101 to the second side 102 intersects with the distribution direction of the plurality of contact pieces 10. A limit block 104 is provided on the second side 102 of the contact piece 10.

[0066] Combination Figure 3 to Figure 5 The elastic element 30 is disposed between the middle portion of the contact piece 10 and the mounting plate 21. The middle portion of the contact piece 10 is the part between the first side 101 and the second side 102 of the contact piece 10. When the contact piece 10 is disposed, the first side 101 of the contact piece 10 can extend out from the space formed by the mounting plate 21, the first side plate 22, and the second side plate 23, and the second side 102 of the contact piece 10 can be located within the space formed by the mounting plate 21, the first side plate 22, and the second side plate 23.

[0067] One end of the elastic element 30 can abut against the middle of the contact piece 10, and the other end of the elastic element 30 can abut against the mounting plate 21. The elastic element 30 can be in a pre-compressed state, thus exhibiting a tendency to elongate. Since the contact piece 10 is rotatably connected to the bracket 20, the elastic element 30 has a pushing effect on the middle of the contact piece 10, causing the first side 101 of the contact piece 10 to tend to move away from the mounting plate 21.

[0068] With moving contact structure 100 Figure 5 Taking the orientation as an example, the first side 101 of the contact piece 10 has a tendency to move downward, while the second side 102 of the contact piece 10 has a tendency to move upward. In this way, the limiting block 104 can reliably abut against the mounting plate 21.

[0069] This combination Figure 2 and Figure 5The specific arrangement of the contact 10 is described below. In the following description, the contact 10 embedded in the contact groove 201 is referred to as a preset contact 103 for ease of explanation.

[0070] In the embodiments of the present application, the preset contact 103 is embedded in the contact groove 201. Compared with directly abutting against the mounting plate 21, the preset contact 103 can rotate to a larger angle under the action of the elastic member 30 due to the arrangement of the contact groove 201. In this way, compared with other contacts 10, the first side 101 of the preset contact 103 is farther away from the mounting plate 21. Based on this, the first side 101 of the preset contact 103 can protrude from other contacts 10.

[0071] Based on the above, in the process of using the movable contact structure 100 to switch the contact 10 and the static contact structure 210 from contact to separation, the preset contact 103 can be separated from the static contact structure 210 later than other contacts 10. Therefore, the electric arc generated due to the separation of the movable contact structure 100 and the static contact structure 210 can be concentrated on the preset contact 103, which is more conducive to the concentration of the electric arc, thereby improving the breaking capacity of the switching device 200.

[0072] It should be noted that, as a preferred manner, the preset contact 103 is a contact 10 with a larger size among the plurality of contacts, i.e., the contact 10 with a larger size is embedded in the contact groove 201.

[0073] In this way, on the one hand, the preset contact 103 can be separated from the static contact structure 210 later than other contacts 10, and on the other hand, the preset contact 103 has a larger size. Under the joint action of these two factors, the concentration effect of the electric arc can be better, which is conducive to improving the breaking capacity of the switching device 200. At this time, the contact groove 201 can be opposite to the middle part of the grid, which is conducive to the entry of the concentrated electric arc into the arc extinguishing device.

[0074] Of course, in other feasible manners, the preset contact 103 can also be a contact 10 with a smaller size. In this way, during the breaking of the switching device 200, the electric arc can be concentrated at the preset contact 103 and the contact 10 with a larger size, which also has the effect of facilitating the concentration of the electric arc.

[0075] In addition, in the present application, the number of preset contacts 103 can be multiple. At this time, the contact groove 201 can be a larger groove, and the limiting blocks 104 of the plurality of preset contacts 103 can be embedded in the contact groove 201. Alternatively, the contact groove 201 can also be provided with multiple contact grooves 201, and the limiting blocks 104 of the plurality of preset contacts 103 are embedded in different contact grooves 201, respectively.

[0076] In the present application, the preset contact 103 is specifically taken as an example of a contact 10 with a larger size among the plurality of contacts for subsequent description.

[0077] In some embodiments, as shown in FIG. 1, the contact slot 201 has a first slot wall 2011 close to the first side plate 22. The size of the plurality of contacts 10 gradually increases in the direction from the first side plate 22 to the second side plate 23 between the first slot wall 2011 and the first side plate 22. Figure 2 and Figure 4 In some embodiments, as shown in FIG. 1, the contact slot 201 has a first slot wall 2011 close to the first side plate 22. The size of the plurality of contacts 10 gradually increases in the direction from the first side plate 22 to the second side plate 23 between the first slot wall 2011 and the first side plate 22.

[0078] In some embodiments, as shown in FIG. 1, the contact slot 201 has a first slot wall 2011 close to the first side plate 22. The size of the plurality of contacts 10 gradually increases in the direction from the first side plate 22 to the second side plate 23 between the first slot wall 2011 and the first side plate 22.

[0079] In some embodiments, as shown in FIG. 1, the contact slot 201 has a first slot wall 2011 close to the first side plate 22. The size of the plurality of contacts 10 gradually increases in the direction from the first side plate 22 to the second side plate 23 between the first slot wall 2011 and the first side plate 22.

[0080] In some embodiments, as shown in FIG. 1, the contact slot 201 has a first slot wall 2011 close to the first side plate 22. The size of the plurality of contacts 10 gradually increases in the direction from the first side plate 22 to the second side plate 23 between the first slot wall 2011 and the first side plate 22.

[0081] In some embodiments, as shown in FIG. 1, the contact slot 201 has a first slot wall 2011 close to the first side plate 22. The size of the plurality of contacts 10 gradually increases in the direction from the first side plate 22 to the second side plate 23 between the first slot wall 2011 and the first side plate 22.

[0082] In some embodiments, as shown in FIG. 1, the contact slot 201 has a first slot wall 2011 close to the first side plate 22. The size of the plurality of contacts 10 gradually increases in the direction from the first side plate 22 to the second side plate 23 between the first slot wall 2011 and the first side plate 22.

[0083] In some embodiments, as shown in FIG. 1, the contact slot 201 has a first slot wall 2011 close to the first side plate 22. The size of the plurality of contacts 10 gradually increases in the direction from the first side plate 22 to the second side plate 23 between the first slot wall 2011 and the first side plate 22.

[0084] In some embodiments, as shown in FIG. 1, the contact slot 201 has a first slot wall 2011 close to the first side plate 22. The size of the plurality of contacts 10 gradually increases in the direction from the first side plate 22 to the second side plate 23 between the first slot wall 2011 and the first side plate 22.

[0085] The sizes of the plurality of contacts 10 between the first slot wall 2011 and the first side plate 22 are not all the same, and correspondingly, the size of the first contact 10 is the smallest, the size of the third contact 10 is the largest, the size of the second contact 10 is larger than the size of the first contact 10 and smaller than the size of the third contact 10, and the size of the third contact 10 is smaller than or equal to the size of the preset contact 103.

[0086] In the above description, the number of contacts 10 between the first side plate 22 and the first slot wall 2011 is taken as an example for illustration, which is 3. It can be understood that this is a feasible setting mode proposed for the convenience of describing the setting of the contacts 10. In the embodiments of the present application, the number of contacts 10 between the first side plate 22 and the first slot wall 2011 can also be other numbers, such as 2 or 4, and the like, and the present application does not make specific limitations thereto.

[0087] Of course, in addition thereto, only one contact 10 can be arranged between the first side plate 22 and the first slot wall 2011.

[0088] In some embodiments, as shown in Figs. 2A and 2B, the contact slot 201 has a second slot wall 2012 close to the second side plate 23, and the sizes of the plurality of contacts 10 gradually increase along the direction from the second side plate 23 to the first side plate 22 between the second slot wall 2012 and the second side plate 23. Figure 2 Figure 4 In some embodiments, as shown in Figs. 2A and 2B, the contact slot 201 has a second slot wall 2012 close to the second side plate 23, and the sizes of the plurality of contacts 10 gradually increase along the direction from the second side plate 23 to the first side plate 22 between the second slot wall 2012 and the second side plate 23.

[0089] In the present application, the sizes of the plurality of contacts 10 gradually increase along the direction from the second side plate 23 to the first side plate 22 between the second slot wall 2012 and the second side plate 23. That is, for the contacts 10 between the second slot wall 2012 and the second side plate 23, the size of the contact 10 close to the second side plate 23 is smaller, and the size of the contact 10 close to the preset contact 103 is larger.

[0090] Through the above setting, the plurality of contacts 10 also have a gradient distribution between the second slot wall 2012 and the second side plate 23, that is, the sizes of the contacts 10 are arranged from large to small between the second slot wall 2012 and the second side plate 23. In this way, the arc contact structure of the contacts 10 can be optimized, and when the moving contact structure 100 and the static contact structure 210 are separated, the arc generated close to the second side plate 23 is less, which is conducive to the concentration of the arc to the preset contact 103, facilitates the arc to enter the arc extinguishing device, and improves the breaking capacity of the switch device 200.

[0091] In some embodiments, the sizes of part of the contacts 10 between the second slot wall 2012 and the second side plate 23 are the same. In this way, the types of the contacts 10 in the moving contact structure 100 can be reduced, that is, the same type of contact 10 is used more, and the production cost of the plurality of contacts 10 can be reduced. ​

[0092] For the specific arrangement of the contact 10 between the second slot wall 2012 and the second side plate 23, reference can be made to the foregoing description of the contact 10 between the first slot wall 2011 and the first side plate 22, and the embodiments of the present application will not be described herein again.

[0093] As a preferred manner, the arrangement of the contact 10 between the preset contact 103 and the first side plate 22 can be consistent with the arrangement of the contact 10 between the preset contact 103 and the second side plate 23.

[0094] In some embodiments, as shown in Figure 1 , Figure 3 and Figure 6 , the movable contact structure 100 further comprises a rotating shaft 40, the contact 10 is provided with a rotating hole 11 and a mounting slot 12 at intervals, the rotating shaft 40 passes through the rotating hole 11 of the first side plate 22, the second side plate 23 and the plurality of contacts 10, the contact 50 is arranged in the mounting slot 12, and the contact 10 can be in contact with the static contact structure 210 through the contact 50. On the side of the contact 10 away from the rotating hole 11, the part of the contact 10 towards the static contact structure 210 is a circular arc structure 60, so as to guide the electric arc generated when the contact 10 separates from the static contact structure 210.

[0095] In the present application, the contact 50 can be arranged in the mounting slot 12 on the contact 10. The contact 10 is further provided with a rotating hole 11 spaced from the mounting slot 12, and the rotating shaft 40 can pass through the rotating hole 11 of the contact 10, so that the contact 10 can rotate around the rotating hole 11 as the center of rotation relative to the mounting plate 21. The rotating hole 11 can be located between the first side 101 of the contact 10 and the second side 102 of the contact 10.

[0096] In the embodiments of the present application, the part of the contact 10 towards the static contact structure 210 is a circular arc structure 60, and according to the foregoing description, the arc contact part of the contact 10 is in a circular arc shape. In this way, the arc contact of the circular arc structure 60 can guide the electric arc generated when the contact 10 separates from the static contact structure 210, so that the electric arc can flow along the circular arc structure 60, which facilitates the electric arc to enter the arc extinguishing device as soon as possible after being generated, and reduces the possibility of damage to other components in the switch device 200 caused by the electric arc flowing in other directions.

[0097] As shown in Figure 5 , on the side of the contact 10 away from the rotating hole 11, the part of the contact 10 towards the static contact structure 210 smoothly transitions with the contact 50.

[0098] Thus, after the arc is generated, the arc can flow along the smooth transition surface of the section of the contact piece 10, reducing the arc residence time at the contact point 50, thereby reducing the possibility of arc burning the contact point 50, and improving the service life and reliability of the movable contact structure 100.

[0099] In some embodiments, the mounting groove 12 has a first inner wall 121 and a second inner wall 122 intersecting, and the contact point 50 is welded to both the first inner wall 121 and the second inner wall 122.

[0100] In the embodiments of the present application, the contact point 50 is embedded in the mounting groove 12, and can be welded to both the first inner wall 121 and the second inner wall 122. The welding can provide stable electrical connection between the contact piece 10 and the contact point 50, ensuring normal transmission of current. On the other hand, the connection strength between the contact point 50 and the contact piece 10 connected by welding is also large, which can withstand large mechanical stress, making the operation of the contact point 50 and the contact piece 10 more stable.

[0101] In the present application, the mounting groove 12 has a first inner wall 121 and a second inner wall 122, and the contact point 50 is welded to both the first inner wall 121 and the second inner wall 122. In this way, the contact area of the contact point 50 and the contact piece 10 can be larger. This can reduce the contact resistance between the contact point 50 and the contact piece 10, which is conducive to reducing the temperature rise during operation of the movable contact structure 100 and improving the performance of the switch device 200.

[0102] In addition, in the present application, as shown in Figure 2 and Figure 6 , the movable contact structure 100 further includes a connecting rod 70 and a contact support 80, the contact support 80 can cooperate with the bracket 20 to mount the plurality of contact pieces 10, one end of the connecting rod 70 can be connected with the rotating shaft 40, and the other end can be connected with an operating mechanism in the switch device 200, so as to drive the connecting rod 70 to drive the contact piece 10 to act through the operating mechanism.

[0103] For the specific arrangement of the contact support 80 and the connecting rod 70 in the movable contact structure 100, the arrangement in the related art can be referred to, and the embodiments of the present application will not be repeated here.

[0104] In the embodiments of the present application, the sizes of some of the plurality of contact pieces 10 are larger than those of the other contact pieces 10. In this way, when the movable contact structure 100 and the static contact structure 210 are separated, the arc generated between the movable contact structure 100 and the static contact structure 210 will be concentrated at the contact with larger size. This is conducive to the arc entering the arc extinguishing device, which can make the arc extinguishing effect of the arc extinguishing device better, and also improve the breaking capacity and performance of the switch device 200 carrying the movable contact structure 100 proposed in the present application.

[0105] Finally, it should be noted that the above embodiments are merely specific embodiments of the present application, and the scope of protection of the present application is not limited thereto. Any changes or substitutions within the technical scope disclosed in the present application should be covered within the scope of protection of the present application. Therefore, the scope of protection of the present application should be subject to the scope of protection of the claims.

Claims

1. A movable contact structure for use in a switching device, the movable contact structure being configured to cooperate with a stationary contact structure, characterized in that The switch device comprises a static contact structure and a movable contact structure. The movable contact structure comprises a plurality of contact pieces, the contact pieces being used to contact or separate from the static contact structure. The movable contact structure further comprises a support, the plurality of contact pieces being mounted on the support, and sizes of some of the plurality of contact pieces being greater than sizes of other of the plurality of contact pieces. The support is provided with contact piece grooves, and some of the plurality of contact pieces are embedded in the contact piece grooves.

2. The movable contact structure according to claim 1, characterized in that The support comprises a mounting plate, a first side plate and a second side plate, the first side plate and the second side plate being connected to two sides of the mounting plate, and the first side plate and the second side plate being oppositely arranged. The plurality of contact pieces are arranged along a direction from the first side plate to the second side plate, the movable contact structure further comprises elastic members, the elastic members being arranged between the contact pieces and the mounting plate, and the plurality of contact pieces being rotatable relative to the mounting plate. The contact piece grooves are arranged on the mounting plate.

3. The moving contact structure according to claim 2, characterized in that The contact piece grooves have first groove walls close to the first side plate, and sizes of the plurality of contact pieces gradually increase along the direction from the first side plate to the second side plate between the first groove walls and the first side plate.

4. The moving contact structure according to claim 3, characterized in that Sizes of some of the plurality of contact pieces are the same between the first groove walls and the first side plate.

5. The moving contact structure of claim 2, wherein The contact piece grooves have second groove walls close to the second side plate, and sizes of the plurality of contact pieces gradually increase along a direction from the second side plate to the first side plate between the second groove walls and the second side plate.

6. The moving contact structure according to claim 5, characterized in that Sizes of some of the plurality of contact pieces are the same between the second groove walls and the second side plate.

7. The moving contact structure of claim 2, wherein The movable contact structure further comprises a rotating shaft and a contact point, rotating holes and mounting grooves are arranged on the contact pieces at intervals, the rotating shaft passes through the rotating holes of the first side plate, the second side plate and the plurality of contact pieces, the contact point is arranged in the mounting grooves, and the contact pieces can contact the static contact structure through the contact point. On a side of the contact piece away from the rotating hole, a part of the contact piece towards the static contact structure is in a circular arc structure, so as to guide an electric arc generated when the contact piece separates from the static contact structure.

8. The moving contact structure according to claim 7, characterized in that On the side of the contact piece away from the rotating hole, the part of the contact piece towards the static contact structure and the contact point are smoothly connected.

9. The moving contact structure of claim 7, wherein The mounting grooves have intersecting first inner walls and second inner walls, and the contact point is welded with the first inner walls and the second inner walls.

10. A switching device, characterized by The switch device comprises the movable contact structure of any one of claims 1-9.

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