A contactor

Abstract

The application provides a contactor, belonging to the technical field of electrical equipment. The contactor comprises an arc extinguishing device, an arc extinguishing cover, an auxiliary contact support and a limiting piece. The arc extinguishing cover is arranged on the arc extinguishing device along a first direction, and the arc extinguishing cover is provided with a clamping groove. The auxiliary contact support is arranged on one side of the arc extinguishing cover provided with the clamping groove, and the auxiliary contact support moves between a first position and a second position. The limiting piece is arranged on the auxiliary contact support, and the limiting piece moves with the auxiliary contact support. When the auxiliary contact support is located at the first position, the current in the contactor flows, the limiting piece is clamped in the clamping groove, and the arc extinguishing cover cannot move in the opposite direction of the first direction. When the auxiliary contact support is located at the second position, the current in the contactor is disconnected, the limiting piece is not clamped in the clamping groove, and the limiting piece is separated from the arc extinguishing cover. The contactor of the application can improve the safety of the contactor in the use process by clamping the limiting piece in the arc extinguishing cover when the internal current flows, so that the arc extinguishing cover cannot be taken off from the contactor.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, and more particularly to a contactor. Background Technology

[0002] A contactor is an electromagnetic automatic switching device, mainly used for frequently connecting or disconnecting AC / DC main circuits and high-capacity control circuits. It features large control capacity, high operating frequency, and reliable operation, and is widely used in industrial automation, power systems, building electrical systems, and other fields.

[0003] When a contactor breaks, it generates a strong electric arc discharge. Without proper protection, this arc can cause irreversible damage to other electronic components and equipment in the surrounding environment, and may even lead to fires or other safety accidents. To reduce the probability of these problems, existing technologies typically incorporate arc-extinguishing chambers to extinguish the arc generated during contactor breaking. However, existing contactors still pose safety hazards during use. Utility Model Content

[0004] This application provides a contactor to improve the safety of the contactor during use.

[0005] In a first aspect, this application provides a contactor comprising an arc-extinguishing device, an arc-extinguishing cover, an auxiliary contact support, and a limiting member. The arc-extinguishing cover is disposed on the arc-extinguishing device along a first direction to prevent arc escape from the arc-extinguishing device, and the arc-extinguishing cover has a retaining groove. The first direction is the height direction of the contactor. The auxiliary contact support is disposed on the side of the arc-extinguishing cover with the retaining groove, and the auxiliary contact support is movable between a first position and a second position. The limiting member is disposed on the auxiliary contact support and is movable with the auxiliary contact support. When the auxiliary contact support is in the first position, current flows in the contactor, and the limiting member engages with the retaining groove, preventing the arc-extinguishing cover from moving in the opposite direction of the first direction. When the auxiliary contact support is in the second position, current is disconnected in the contactor, the limiting member releases from the retaining groove, and the limiting member disengages from the arc-extinguishing cover.

[0006] Through the above-described scheme, the limiting element mentioned in this application is disposed on the auxiliary contact support. The auxiliary contact support can move from the first position to the second position within the contactor, thus driving the limiting element to move synchronously during the movement of the auxiliary contact support. Since the arc-extinguishing chamber is fixed, the movement of the limiting element can achieve two states: the limiting element is engaged in or disengaged from the arc-extinguishing chamber. When current flows through the contactor, the limiting element is engaged in the arc-extinguishing chamber, thus limiting the arc-extinguishing chamber and preventing it from being removed from the contactor. This reduces the probability of electric shock caused by operator error in removing the arc-extinguishing chamber when current flows through the contactor, thereby improving the safety of the contactor during use. When the current in the contactor is disconnected, the limiting element disengages from the arc-extinguishing chamber, no longer limiting the arc-extinguishing chamber. At this time, the arc-extinguishing chamber can be removed from the contactor. Thus, while improving the safety of the contactor during use, it does not affect the normal use and maintenance of the contactor.

[0007] In one possible design, two auxiliary contact supports are provided, symmetrically arranged outside the arc-extinguishing chamber, and each auxiliary contact support is provided with a limiting element. The arc-extinguishing chamber has a slot opposite to each of the two limiting elements, and the slot on the same side of the arc-extinguishing chamber engages with the limiting element.

[0008] With the above scheme, the limiting component is set on the auxiliary contact support, and the limiting component and the auxiliary contact support cooperate to limit the arc-extinguishing chamber. Each side of the arc-extinguishing chamber has a slot, and there are two auxiliary contact supports, each set on one side of the arc-extinguishing chamber. When the two auxiliary contact supports are each equipped with a limiting component, the two limiting components can simultaneously limit the arc-extinguishing chamber, thus improving the limiting effect.

[0009] In one possible design, an installation space is provided in the auxiliary contact support. The limiting member includes a connecting part and a snap-fit ​​part. The connecting part is located within the installation space, and the snap-fit ​​part includes a first end and a second end positioned opposite each other. The first end connects to the connecting part, and the second end is used to snap into a card slot.

[0010] Through the above scheme, the mounting space on the auxiliary contact support can provide a mounting base for the limiting component, allowing the limiting component to be installed on the auxiliary contact support. The limiting component includes a connecting part and a snap-fit ​​part. The connecting part is located within the mounting space, allowing the limiting component to be installed on the auxiliary contact support. The snap-fit ​​part connects with the connecting part, allowing a portion of the limiting component to extend out of the mounting space and cooperate with a slot provided on the arc-extinguishing cover to limit the arc-extinguishing cover.

[0011] In one possible design, the auxiliary contact support has a first window and a second window communicating with the mounting space. A limiting member enters the mounting space through the first window, and the second window is located on the side of the auxiliary contact support near the arc-extinguishing shroud. The second end of the snap-fit ​​portion extends out of the mounting space through the second window.

[0012] The above scheme allows the first window to be installed within the installation space, enabling the limiting component to be mounted through it. A second window, positioned near the arc-extinguishing shroud on the side of the auxiliary contact support, allows the second end of the locking portion to extend out of the installation space through the second window, thus engaging with the slot on the arc-extinguishing shroud.

[0013] In one possible design, the first window is equipped with a limiting structure. The limiting structure can limit the connection part, preventing it from moving towards the arc-extinguishing shield.

[0014] Through the above solution, the limiting structure can restrict the connecting part, preventing it from moving towards the arc-extinguishing chamber. Thus, when the locking part engages with the slot, the range of movement of the limiting member towards the arc-extinguishing chamber can be reduced, or the range of movement of the limiting member away from the arc-extinguishing chamber can be reduced, thereby improving the reliability of the limiting member's control over the arc-extinguishing chamber.

[0015] In one possible design, there is a connecting angle between the connecting part and the snap-fit ​​part. The connecting angle is a rounded angle.

[0016] With the above solution, when the auxiliary contact supports move from the first position to the second position, the second end of the connecting part will be subjected to force, causing the first end of the connecting part to deform. When the connection angle between the connecting part and the snap-fit ​​part is an arc angle, the stress on the connection between the connecting part and the snap-fit ​​part can be reduced, which can reduce the possibility of breakage at the connection between the connecting part and the snap-fit ​​part, thereby improving the reliability of the limiting component.

[0017] In one possible design, the second end has an abutment surface. The abutment surface faces the groove wall in the first direction, and the abutment surface is in contact with the groove wall surface.

[0018] With the above solution, the abutting surface faces the groove wall of the slot. When the engaging part is engaged in the slot, the line-to-surface contact between the second end and the slot in the prior art can be transformed into a surface-to-surface contact between the second end and the slot. The abutting surface facing the groove wall in the first direction allows the second end of the engaging part to make surface-to-surface contact with the slot when the auxiliary contact support moves along the first direction. As described above, during the movement of the auxiliary contact support from the first position to the second position, the engaging part enters the installation space. Therefore, when the auxiliary contact support is in the first position, the second end of the engaging part makes surface-to-surface contact with the slot. This makes the abutment between the second end and the slot more secure, thereby improving the reliability of the limiting component.

[0019] In one possible design, the limiting element is configured as a spring, which includes a third end and a fourth end positioned opposite each other. The third end connects to the auxiliary contact near the arc-extinguishing chamber. The fourth end faces the arc-extinguishing chamber and is used to engage with a slot.

[0020] With the above scheme, the third end of the spring is connected to the side of the auxiliary contact support near the arc-extinguishing chamber, and the fourth end of the spring faces the arc-extinguishing chamber. When the auxiliary contact support moves from the second position to the first position within the contactor, the auxiliary contact support can drive the spring to move synchronously during the movement, allowing the spring to engage with the slot. When the auxiliary contact support moves from the first position to the second position within the contactor, the auxiliary contact support can drive the spring to move synchronously during the movement, releasing the engagement between the spring and the slot, thus allowing the spring to disengage from the slot.

[0021] In one possible design, the contactor further includes an auxiliary housing that covers the auxiliary contact support. A through slot is formed on the side of the auxiliary housing near the arc-extinguishing shield, the position of which corresponds to the position of the retaining slot. The retaining part engages with the retaining slot via the through slot.

[0022] Through the above scheme, the auxiliary housing can provide support and protection for the auxiliary contact support. When the auxiliary contact support moves from the first position to the second position, or from the second position to the first position, the auxiliary housing can also guide the movement of the auxiliary contact support, improving the reliability of the auxiliary contact support. The through slot allows the locking part to extend from inside the auxiliary housing to the outside. The through slot corresponds to the locking groove, allowing the locking part to enter the locking groove and engage with it after extending outside the auxiliary housing.

[0023] In one possible design, the size of the through slot is the same as the size of the card slot.

[0024] With the above solution, when the size of the through groove is the same as the size of the slot, the problem that the second end cannot contact the slot wall due to the through groove being too small can be reduced, so that the abutting surface can contact the slot wall surface, thereby enabling the locking part to lock better with the slot. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the contactor provided in an embodiment of this application.

[0026] Figure 2 A cross-sectional view of the contactor when the auxiliary contact support provided in the embodiment of this application is in the first position.

[0027] Figure 3 for Figure 2 An enlarged view of section A.

[0028] Figure 4 A cross-sectional view of the contactor when the auxiliary contact support provided in the embodiment of this application is in the second position.

[0029] Figure 5 for Figure 4 A magnified view of section B.

[0030] Figure 6 This is a schematic diagram of the contactor provided in the embodiment of this application after removing the arc-extinguishing cover.

[0031] Figure 7 This is a schematic diagram of the arc-extinguishing shield provided in an embodiment of this application.

[0032] Figure 8 This is a schematic diagram of the auxiliary contact support provided in an embodiment of this application.

[0033] Figure 9 This is a schematic diagram of the limiting member provided in an embodiment of this application from one viewpoint.

[0034] Figure 10 This is an assembly diagram of the auxiliary contact support and limiting member provided in the embodiments of this application.

[0035] Figure 11 A side view of the auxiliary contact support and limiting member being assembled according to an embodiment of this application.

[0036] Figure 12 for Figure 11 A magnified view of section C.

[0037] Figure 13 This is a schematic diagram of the limiting member provided in an embodiment of this application from another perspective.

[0038] Figure 14 This is a schematic diagram of the auxiliary housing provided in an embodiment of this application.

[0039] Explanation of reference numerals in the attached figures:

[0040] 100. Arc extinguishing device;

[0041] 200. Arc extinguishing shield; 210. Card slot;

[0042] 300. Auxiliary contact support; 310. First window; 320. Second window; 330. Limiting structure;

[0043] 400. Limiting component; 410. Connecting part; 420. Snap-fit ​​part; 421. First end; 422. Second end; 423. Abutting surface;

[0044] 500. Auxiliary housing; 510. Through groove;

[0045] 600. Outer shell; 610. Base; 620. Middle cover;

[0046] 700. Moving iron core;

[0047] 800, static iron core;

[0048] 900. Main contact support;

[0049] OX, First Direction. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0051] 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 herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0052] The terms "comprising" and "having," and any variations thereof, used in the specification, claims, and drawings of this application are intended to cover without excluding other meanings. The words "a" or "an" do not exclude the presence of multiples.

[0053] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0054] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0055] The directional terms appearing in the following description refer to the directions shown in the figures and are not intended to limit the specific structure of this application. For example, in the description of this application, terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the figures. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0056] Furthermore, the terms "first," "second," etc., in the specification and claims of this application or in the aforementioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0057] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, "connection" or "joining" in mechanical structures can refer to a physical connection. A physical connection can be a fixed connection, such as a connection secured by fasteners, such as a connection secured by screws, bolts, or other fasteners; a physical connection can also be a detachable connection, such as a snap-fit ​​or interlocking connection; a physical connection can also be an integral connection, such as a connection formed by welding, bonding, or integral molding. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0058] A contactor is an electromagnetic automatic switching device, mainly used for frequently connecting or disconnecting AC / DC main circuits and high-capacity control circuits. It features large control capacity, high operating frequency, and reliable operation, and is widely used in industrial automation, power systems, building electrical systems, and other fields.

[0059] When a contactor breaks, it generates a strong electric arc discharge. Without proper protection, this arc can cause irreversible damage to other electronic components and equipment in the surrounding environment, and may even cause safety accidents such as fires. To reduce the probability of these problems, existing technologies typically incorporate arc-extinguishing chambers to extinguish the arc generated when the contactor breaks.

[0060] However, in the use of existing contactors, there is a possibility that operators may remove the arc-extinguishing cover, which could lead to electric shock to the operators.

[0061] To address the aforementioned problems, this application provides a contactor. To enable those skilled in the art to better understand the solution of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0062] Figure 1 This is a schematic diagram of the overall structure of the contactor provided in an embodiment of this application. Figure 2 A cross-sectional view of the contactor when the auxiliary contact support provided in the embodiment of this application is in the first position. Figure 3 for Figure 2 An enlarged view of section A. Figure 4 A cross-sectional view of the contactor when the auxiliary contact support provided in the embodiment of this application is in the second position. Figure 5 for Figure 4 An enlarged view of section B. (See image.) Figures 1 to 5 As shown, this application provides a contactor including an arc-extinguishing device 100, an arc-extinguishing cover 200, an auxiliary contact support 300, and a limiting member 400. The arc-extinguishing cover 200 is disposed on the arc-extinguishing device 100 along a first direction OX to prevent arc from escaping from the arc-extinguishing device 100. The arc-extinguishing cover 200 has a slot 210. The first direction OX is the height direction of the contactor. The auxiliary contact support 300 is disposed on the side of the arc-extinguishing cover 200 where the slot 210 is located, and the auxiliary contact support 300 is movable between a first position and a second position. The limiting member 400 is disposed on the auxiliary contact support 300 and is movable with the auxiliary contact support 300.

[0063] The contactor has a housing 600, which includes a base 610 and a middle cover 620. The middle cover 620 and the base 610 are closed to form a receiving cavity, in which some components of the contactor can be housed. During the breaking process, the contactor generates an electric arc, which is extinguished by an arc-extinguishing device 100. The arc-extinguishing device 100 can be riveted to the arc-extinguishing chamber 200.

[0064] During the process of extinguishing the electric arc by the arc-extinguishing device 100, some of the arc may escape from the arc-extinguishing device 100. Therefore, this application also provides an arc-extinguishing cover 200 inside the contactor to prevent the arc from escaping from the arc-extinguishing device 100. The arc-extinguishing cover 200 can be installed on the arc-extinguishing device 100 along a first direction OX, where the first direction OX can be the direction in which the arc-extinguishing cover 200 is installed towards the contactor.

[0065] Please continue to refer to Figures 1 to 5As shown, when the auxiliary contact support 300 is in the first position, current flows through the contactor, and the limiting member 400 is engaged in the slot 210, preventing the arc-extinguishing cover 200 from moving in the opposite direction of the first direction OX. When the auxiliary contact support 300 is in the second position, the current in the contactor is disconnected, the limiting member 400 is released from the slot 210, and the limiting member 400 disengages from the arc-extinguishing cover 200.

[0066] The contactor also includes an electromagnetic system and a contact system. The electromagnetic system comprises a moving iron core 700 and a stationary iron core 800, and the contact system comprises a main contact support 900. The moving iron core 700, the stationary iron core 800, and the main contact support 900 can all be housed within the receiving cavity formed by the middle cover 620 and the base 610. The stationary iron core 800 is fixedly mounted on the base 610, and the moving iron core 700 is fixedly connected to the main contact support 900. The main contact support 900 can reciprocate within the receiving cavity along a first direction OX and the opposite direction of the first direction OX. The opposite direction of the first direction OX can be the direction in which the arc-extinguishing cover 200 is removed from the contactor.

[0067] A contactor includes normally open contacts and normally closed contacts. A normally open contact is open when the contactor is not energized, and closes when the contactor is energized. A normally closed contact is closed when the contactor is not energized, and opens when the contactor is energized. This application uses a normally open contact as an example for specific illustration.

[0068] The auxiliary contact support 300 is fixedly connected to the main contact support 900. When the main contact support 900 moves, the auxiliary contact support 300 can move synchronously with the main contact support 900, allowing the auxiliary contact support 300 to move between a first position and a second position. A limiting member 400 is provided on the auxiliary contact support 300, and when the auxiliary contact support 300 moves, it can drive the limiting member 400 to move together.

[0069] When the auxiliary contact support 300 is in the first position, the moving iron core 700 is in contact with the stationary iron core 800, and the current flows in the contactor. At this time, the limiting member 400 is engaged in the slot 210 to limit the arc extinguishing cover 200, so that the arc extinguishing cover 200 cannot move in the opposite direction of the first direction OX.

[0070] When the auxiliary contact support 300 is in the second position, the moving iron core 700 separates from the stationary iron core 800, and the current in the contactor is disconnected. At this time, the limiting member 400 is not engaged with the slot 210, the limiting member 400 is disengaged from the arc extinguishing cover 200, and no longer limits the arc extinguishing cover 200. The arc extinguishing cover 200 can be removed from the contactor.

[0071] In summary, the limiting member 400 mentioned in this application is disposed on the auxiliary contact support 300. The auxiliary contact support 300 can move from the first position to the second position within the contactor. Thus, during the movement of the auxiliary contact support 300, the limiting member 400 can move synchronously. Since the arc-extinguishing cover 200 is fixed, the movement of the limiting member 400 can achieve two states: the limiting member 400 is engaged in the arc-extinguishing cover 200 or disengaged from the arc-extinguishing cover 200.

[0072] When current flows through the contactor, the limiting component 400 engages with the arc-extinguishing cover 200. At this time, the arc-extinguishing cover 200 is limited and cannot be removed from the contactor. This reduces the probability of electric shock caused by operator error in removing the arc-extinguishing cover 200 when current flows through the contactor. This improves the safety of the contactor during use.

[0073] When the current in the contactor is disconnected, the limiting member 400 disengages from the arc-extinguishing cover 200 and no longer limits the arc-extinguishing cover 200. At this time, the arc-extinguishing cover 200 can be removed from the contactor. In this way, the safety of the contactor during use is improved without affecting the normal use and maintenance of the contactor.

[0074] Figure 6 This is a schematic diagram of the contactor provided in the embodiment of this application after removing the arc-extinguishing cover. Figure 7 This is a schematic diagram of the arc-extinguishing shield provided in an embodiment of this application. Figure 1 , Figure 3 , Figure 6 as well as Figure 7 As shown, there are two auxiliary contact supports 300, which are symmetrically arranged outside the arc-extinguishing cover 200. Each of the two auxiliary contact supports 300 is provided with a limiting member 400. The arc-extinguishing cover 200 and the two limiting members 400 are provided with a slot 210 at the position opposite to each other. The slot 210 on the same side of the arc-extinguishing cover 200 cooperates with the limiting member 400.

[0075] The slot 210 can be a blind slot structure provided on the side wall of the arc extinguishing cover 200. The slot opening of the slot 210 can face the auxiliary contact support 300 so that the limiting member 400 provided on the auxiliary contact support 300 can be engaged in the slot 210.

[0076] The arc-extinguishing shield 200 can be located between the two auxiliary contact supports 300, and each side of the arc-extinguishing shield 200 can be provided with a slot 210. Because both auxiliary contact supports 300 are provided with limiting members 400, and the slots 210 correspond to the positions of the limiting members 400, the two limiting members 400 can be simultaneously engaged with the slots 210, or neither of the two limiting members 400 can be engaged with the slots 210.

[0077] The slot 210 can be integrally formed with the arc-extinguishing cover 200, or the slot 210 can be set on the arc-extinguishing cover 200 by grooving or carving after the arc-extinguishing cover 200 is formed.

[0078] In summary, the limiting member 400 is disposed on the auxiliary contact support 300, and the limiting member 400 cooperates with the auxiliary contact support 300 to limit the arc-extinguishing cover 200. Each side of the arc-extinguishing cover 200 has a slot 210. There are two auxiliary contact supports 300, each disposed on one side of the arc-extinguishing cover 200. When both auxiliary contact supports 300 are equipped with limiting members 400, the two limiting members 400 can simultaneously limit the arc-extinguishing cover 200, thus improving the limiting effect.

[0079] The auxiliary contact support 300, the limiting member 400, and the assembly between them mentioned in the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0080] Figure 8 This is a schematic diagram of the auxiliary contact support provided in an embodiment of this application. Figure 9 This is a schematic diagram of the limiting member provided in an embodiment of this application from one viewpoint. Figure 10 This is an assembly diagram of the auxiliary contact support and limiting member provided in the embodiments of this application. Figures 8 to 10 As shown, the auxiliary contact support 300 has an installation space. The limiting member 400 includes a connecting part 410 and a snap-fit ​​part 420. The connecting part 410 is located within the installation space, and the snap-fit ​​part 420 includes a first end 421 and a second end 422 that are positioned opposite each other. The first end 421 is connected to the connecting part 410, and the second end 422 is used to snap into the card slot 210.

[0081] The installation space can be set on the side of the auxiliary contact support 300 close to the arc extinguishing cover 200. In this way, when the limiting member 400 is set in the installation space, it can cooperate with the arc extinguishing cover 200 to limit the arc extinguishing cover 200.

[0082] The limiting member 400 includes a connecting portion 410 and a snap-fit ​​portion 420 that are interconnected. The connecting portion 410 can be located within the installation space so that the limiting member 400 can be mounted on the auxiliary contact support 300. The snap-fit ​​portion 420 can be a long strip-shaped structure, with its two farthest ends being a first end 421 and a second end 422, respectively. The first end 421 of the snap-fit ​​portion 420 can be connected to the connecting portion 410, and the first end 421 of the snap-fit ​​portion 420 can be located within the installation space. The second end 422 of the snap-fit ​​portion 420 can extend out of the installation space to engage with the slot 210 to limit the arc-extinguishing cover 200.

[0083] The first end 421 of the latching part 420 is relatively thin and is prone to deformation. When the limiting member 400 limits the arc-extinguishing cover 200, the second end 422 is located in the slot 210. When the limiting member 400 does not limit the arc-extinguishing cover 200, the side wall of the arc-extinguishing cover 200 can squeeze the second end 422, causing the first end 421 to deform, thereby allowing the second end 422 to enter the installation space.

[0084] As described above, the mounting space on the auxiliary contact support 300 provides a mounting base for the limiting member 400, allowing the limiting member 400 to be mounted on the auxiliary contact support 300. The limiting member 400 includes a connecting portion 410 and a snap-fit ​​portion 420. The connecting portion 410 is located within the mounting space, allowing the limiting member 400 to be mounted on the auxiliary contact support 300. The snap-fit ​​portion 420 connects with the connecting portion 410, allowing a portion of the limiting member 400 to extend out of the mounting space and engage with the slot 210 provided on the arc-extinguishing cover 200 to limit the arc-extinguishing cover 200.

[0085] like Figure 8 , Figure 9 as well as Figure 10 As shown, the auxiliary contact support 300 has a first window 310 and a second window 320 communicating with the installation space. The limiting member 400 enters the installation space through the first window 310, and the second window 320 is located on the side of the auxiliary contact support 300 near the arc extinguishing cover 200. The second end 422 of the snap-fit ​​portion 420 extends out of the installation space through the second window 320.

[0086] The first window 310 can be a slot structure opened on the auxiliary contact support 300, and the first window 310 can be connected to the installation space. When the limiting member 400 is installed into the installation space, force can be applied to the second end 422 firstly. At this time, the first end 421 deforms, and the second end 422 moves closer to the connecting part 410. When the second end 422 moves closer to the connecting part 410, or when the second end 422 contacts the connecting part 410, the limiting member 400 can be installed in the installation space through the first window 310.

[0087] The second window 320 can be a slot structure opened on the auxiliary contact support 300, and the second window 320 can also be connected to the installation space. The second window 320 is located on the side of the auxiliary contact support 300 near the arc extinguishing cover 200. When the first end 421 recovers its deformation, the second end 422 can extend out of the installation space through the second window 320 under the action of elastic force.

[0088] The first window 310 and the second window 320 can be disposed on two adjacent side walls of the auxiliary contact support 300, thus forming a limiting post between the first window 310 and the second window 320. With the second end 422 of the latching portion 420 extending out of the mounting space, the projection of the latching portion 420 coincides with the projection of the limiting post along the opening direction of the first window 310. Furthermore, the projection of the second window 320 can be smaller than the projection of the connecting portion 410 along the opening direction of the second window 320. In this way, the limiting post can limit the connecting portion 410 in both the opening direction of the first window 310 and the opening direction of the second window 320, reducing the likelihood of the limiting member 400 falling off the auxiliary contact support 300.

[0089] In summary, by providing the first window 310, the limiting member 400 can be installed in the installation space through the first window 310. By providing the second window 320 and positioning the second window 320 on the side of the auxiliary contact support 300 near the arc-extinguishing cover 200, the second end 422 of the locking part 420 can extend out of the installation space through the second window 320, thereby enabling it to engage with the slot 210 provided on the arc-extinguishing cover 200.

[0090] Figure 11 A side view of the auxiliary contact support and limiting member being assembled according to an embodiment of this application. Figure 12 for Figure 11 A magnified view of section C. (See image.) Figure 9 , Figures 10 to 12 As shown, the first window 310 is also provided with a limiting structure 330. The limiting structure 330 can limit the connecting part 410, preventing the connecting part 410 from moving toward the arc extinguishing cover 200.

[0091] The limiting structure 330 can be a chamfered structure provided on the two opposite side walls of the installation space located at the farthest point from the first window 310. When the limiting member 400 is located in the installation space, the side of the connecting part 410 facing the arc-extinguishing cover 200 can abut against the chamfered structure, which can limit the connecting part 410 and prevent the connecting part 410 from moving towards the arc-extinguishing cover 200.

[0092] In summary, the limiting structure 330 can restrict the connecting portion 410, preventing it from moving towards the arc-extinguishing shield 200. Thus, when the engaging portion 420 engages with the slot 210, the range of movement of the limiting member 400 towards the arc-extinguishing shield 200 can be reduced, or the range of movement of the limiting member 400 away from the arc-extinguishing shield 200 can be reduced, thereby improving the reliability of the limiting member 400 in limiting the arc-extinguishing shield 200.

[0093] Please continue to refer to Figure 8 as well as Figure 9As shown, there is a connecting angle between the connecting part 410 and the snap-fit ​​part 420. The connecting angle is a rounded angle.

[0094] In the first possible case, the connecting part 410 is provided with a bent part, which can be arc-shaped. The bent part is connected to the snap-fit ​​part 420 so that the connection angle between the connecting part 410 and the snap-fit ​​part 420 forms an arc angle.

[0095] In another possible case, the first end 421 of the snap-fit ​​portion 420 is provided with a bent portion, which can be arc-shaped. The bent portion is connected to the connecting portion 410, so that the connection angle between the connecting portion 410 and the snap-fit ​​portion 420 forms an arc angle.

[0096] With the above settings, when the auxiliary contact support 300 moves from the first position to the second position, the second end 422 of the connecting part 410 will be subjected to force, causing deformation at the first end 421 of the connecting part 410. When the connection angle between the connecting part 410 and the locking part 420 is an arc angle, the stress on the connection between the connecting part 410 and the locking part 420 can be reduced, thus reducing the possibility of breakage at the connection between the connecting part 410 and the locking part 420, thereby improving the reliability of the limiting member 400.

[0097] In some possible implementations, such as Figure 7 , Figure 8 as well as Figure 10 As shown, the limiting member 400 is configured as a spring, which includes a third end and a fourth end positioned opposite each other. The third end is connected to the side of the auxiliary contact support 300 near the arc-extinguishing chamber 200. The fourth end faces the arc-extinguishing chamber 200 and is used to engage with the slot 210.

[0098] The spring can be a flexible plate-like structure. When the auxiliary contact support 300 moves from the first position to the second position, the third end can deform, allowing the limiting member 400 to enter the mounting space. When the auxiliary contact support 300 moves from the second position to the first position, the third end returns to its original shape, allowing the fourth end to enter the slot 210 and engage with it.

[0099] The spring can be integrally formed with the auxiliary contact support 300, or the spring can be set on the side of the auxiliary contact support 300 near the arc extinguishing cover 200 by welding or bonding after the auxiliary contact support 300 is formed.

[0100] In summary, the third end of the spring is connected to the side of the auxiliary contact support 300 near the arc-extinguishing shield 200, and the fourth end of the spring faces the arc-extinguishing shield 200. When the auxiliary contact support 300 moves from the second position to the first position within the contactor, the auxiliary contact support 300 can drive the spring to move synchronously during the movement, allowing the spring to engage with the slot 210. When the auxiliary contact support 300 moves from the first position to the second position within the contactor, the auxiliary contact support 300 can drive the spring to move synchronously during the movement, releasing the engagement between the spring and the slot 210, thus disengaging the spring from the slot 210.

[0101] The solution described below is only illustrated using the combination of the connecting part 410 and the snap-fit ​​part 420 as an example of the limiting member 400. However, the solution described below is also applicable to the form where the limiting member 400 is a spring. When designing the solution described below based on the limiting member 400 being a spring, the relevant descriptions can be adjusted accordingly.

[0102] Figure 13 This is a schematic diagram of the limiting member provided in an embodiment of this application from another perspective. (See diagram below.) Figures 1 to 10 as well as Figure 13 As shown, the second end 422 is provided with an abutment surface 423. The abutment surface 423 faces the groove wall of the slot 210 in the first direction OX, and the abutment surface 423 is in contact with the groove wall surface.

[0103] The abutment surface 423 can be the end face of the second end 422, and the abutment surface 423 can face the groove wall of the slot 210 that is closer to the stationary iron core 800 in the first direction OX. When the engaging part 420 is engaged in the slot 210, the abutment surface 423 can make surface-to-surface contact with the groove wall of the slot 210 that is closer to the stationary iron core 800 in the first direction OX.

[0104] In summary, with the abutment surface 423 facing the groove wall of the slot 210, when the engaging part 420 engages with the slot 210, the line-to-surface contact between the second end 422 and the slot 210 in the prior art can be transformed into a surface-to-surface contact between the second end 422 and the slot 210. The abutment surface 423 facing the groove wall of the slot 210 in the first direction OX allows the second end 422 of the engaging part 420 to make surface-to-surface contact with the slot 210 when the auxiliary contact support 300 moves along the first direction OX. As described above, during the movement of the auxiliary contact support 300 from the first position to the second position, the engaging part 420 enters the installation space. Therefore, when the auxiliary contact support 300 is in the first position, the second end 422 of the engaging part 420 makes surface-to-surface contact with the slot 210. This makes the abutment between the second end 422 and the slot 210 more secure, thereby improving the reliability of the limiting member 400.

[0105] like Figures 1 to 7 As shown, the contactor mentioned in this application also includes an auxiliary housing 500, which covers the auxiliary contact support 300.

[0106] The auxiliary housing 500 can be fixedly connected to the middle cover 620. The auxiliary contact support 300 is located inside the auxiliary housing 500, and the auxiliary contact support 300 can reciprocate within the auxiliary housing 500 along the first direction OX and the opposite direction of the first direction OX.

[0107] With the above configuration, the auxiliary housing 500 can provide support and protection for the auxiliary contact support 300. When the auxiliary contact support 300 moves from the first position to the second position, or from the second position to the first position, the auxiliary housing 500 can also guide the movement of the auxiliary contact support 300, thereby improving the reliability of the auxiliary contact support 300.

[0108] Figure 14 This is a schematic diagram of the auxiliary housing provided in an embodiment of this application. Figure 1 , Figure 3 , Figure 5 , Figure 7 as well as Figure 14 As shown, a through groove 510 is also provided on the side of the auxiliary housing 500 near the arc extinguishing cover 200, and the position of the through groove 510 corresponds to the position of the slot 210. The snap-fit ​​part 420 is snapped into the slot 210 through the through groove 510.

[0109] The auxiliary housing 500 may have a channel inside for the auxiliary contact support 300 to reciprocate along the first direction OX and the opposite direction of the first direction OX. The through groove 510 may communicate with this channel so that the snap-fit ​​part 420 can extend to the outside of the auxiliary housing 500 through the through groove 510. The through groove 510 may be integrally formed with the auxiliary housing 500, or the through groove 510 may be provided on the auxiliary housing 500 after the auxiliary housing 500 is formed by grooving or engraving.

[0110] In summary, the through slot 510 allows the snap-fit ​​part 420 to extend from inside the auxiliary housing 500 to the outside of the auxiliary housing 500. The through slot 510 corresponds to the snap-fit ​​groove 210, allowing the snap-fit ​​part 420 to enter the snap-fit ​​groove 210 and snap into it after extending outside the auxiliary housing 500.

[0111] like Figure 3 , Figure 5 , Figure 7 as well as Figure 14 As shown, the size of the through slot 510 is the same as the size of the slot 210.

[0112] When the size of the through groove 510 is the same as the size of the slot 210, the problem that the second end 422 cannot contact the groove wall of the slot 210 due to the through groove 510 being too small can be reduced, so that the abutting surface 423 can contact the groove wall surface of the slot 210, thereby enabling the locking part 420 to better lock into the slot 210.

Claims

1. A contactor, characterized in that, include: Arc extinguishing device, arc extinguishing cover, auxiliary contact support and limiting components; The arc-extinguishing cover is disposed on the arc-extinguishing device along a first direction to prevent the electric arc in the arc-extinguishing device from escaping; wherein, the first direction is the height direction of the contactor. The arc-extinguishing cover is provided with a slot, and the auxiliary contact is supported on the side of the arc-extinguishing cover where the slot is provided; The limiting member is disposed on the auxiliary contact support, and the limiting member can move between the first position and the second position with the auxiliary contact support; When the auxiliary contact is in the first position, current flows through the contactor, and the limiting member engages with the slot to restrict the arc extinguishing cover from moving in the opposite direction of the first direction. When the auxiliary contact moves from the first position to the second position, the current in the contactor is disconnected, the limiting member is released from the slot, and the limiting member can be disengaged from the arc extinguishing cover.

2. The contactor according to claim 1, characterized in that, The auxiliary contact support is provided in two parts, which are symmetrically arranged outside the arc extinguishing cover. Each of the two auxiliary contact supports is provided with a limiting member. The arc-extinguishing cover is provided with a slot at a position opposite to the two limiting members, and the slot on the same side of the arc-extinguishing cover cooperates with the limiting member.

3. The contactor according to claim 2, characterized in that, The auxiliary contact support is provided with installation space; The limiting component includes a connecting part and a snap-fit ​​part; The connecting part is located within the installation space, and the snap-fit ​​part includes a first end and a second end that are positioned opposite each other. The first end is connected to the connecting part, and the second end is used to snap into the slot.

4. The contactor according to claim 3, characterized in that, The auxiliary contact support is provided with a first window and a second window that communicate with the installation space; The limiting member enters the installation space through the first window, and the second window is located on the side of the auxiliary contact support near the arc extinguishing cover; The second end of the snap-fit ​​portion extends out of the mounting space through the second window.

5. The contactor according to claim 4, characterized in that, The first window is equipped with a limiting structure; The limiting structure can limit the connection part, preventing it from moving toward the arc extinguishing cover.

6. The contactor according to claim 3, characterized in that, There is a connection angle between the connecting part and the snap-fit ​​part; The connecting angle is a rounded angle.

7. The contactor according to any one of claims 3-6, characterized in that, The second end is provided with an abutment surface; The abutting surface faces the groove wall of the slot in the first direction; The contact surface is in contact with the surface of the groove wall.

8. The contactor according to claim 2, characterized in that, The limiting member is configured as a spring piece, the spring piece including a third end and a fourth end that are positioned opposite each other; The third end is connected to the auxiliary contact near the side of the arc-extinguishing shroud; The fourth end faces the arc-extinguishing cover and is used to engage with the slot.

9. The contactor according to claim 3, characterized in that, It also includes an auxiliary housing, which covers the auxiliary contact support; The auxiliary housing has a through groove at the position opposite to the slot; The end of the snap-fit ​​portion away from the connecting portion passes through the through groove and snaps into the groove.

10. The contactor according to claim 9, characterized in that, The size of the through slot is the same as the size of the card slot.

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