Contact assembly, load switch and electricity meter

Abstract

The utility model provides a contact assembly, a load switch and an ammeter, and relates to the technical field of electrical equipment. The contact assembly comprises a shell, a static contact, a first leading-out piece and a moving contact. The static contact is arranged on the shell; the first lead-out piece comprises a first section, a second section and a third section which are connected in sequence; one end of the moving contact is used for being connected with the static contact, the other end of the moving contact is connected with the first section, the first section and the third section are located on the two sides of the moving contact in the thickness direction respectively, and under the condition that the moving contact and the static contact are switched on, the flow direction of current passing through the moving contact is opposite to the flow direction of current passing through the first section and is the same as the flow direction of current passing through the third section. Therefore, the magnetic field generated by the two sections of current generates acting force for moving towards the static contact on the moving contact, the stable contact of the moving contact and the static contact is ensured, and the operation stability of the contact assembly and the endurance capability of resisting short-circuit current are improved.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, and more specifically, to a contact assembly, a load switch, and an electricity meter. Background Technology

[0002] To ensure the safe operation of electrical systems, electrical devices with reliable current-carrying, current-connecting, and current-disconnecting capabilities are typically installed. Furthermore, these devices can also perform current-connecting, current-carrying, and current-disconnecting functions in the event of abnormal circuit faults (such as short circuits).

[0003] However, the closing state of existing electrical devices, such as load switches, is unstable. They are prone to contact repulsion under abnormal circuit fault conditions, which not only leads to unstable operation of the power system, but may also cause safety hazards. Utility Model Content

[0004] This invention provides a contact assembly, a load switch, and an electricity meter, which can enhance the contact force between the moving contact and the stationary contact in the closed state, thereby ensuring stable contact between the moving contact and the stationary contact, and effectively improving the operational stability of the contact assembly and its ability to withstand short-circuit current.

[0005] The embodiments of this utility model can be implemented as follows:

[0006] In a first aspect, this utility model provides a contact assembly, comprising:

[0007] case;

[0008] A stationary contact, wherein the stationary contact is disposed in the housing;

[0009] The first lead-out component includes a first segment, a second segment, and a third segment connected in sequence;

[0010] The moving contact has a moving contact portion at one end for contacting or separating from the stationary contact, and the other end is connected to the first segment. When the moving contact is closed with the stationary contact, at least a portion of the first segment and at least a portion of the third segment are located on both sides of the moving contact, and the current flows in opposite directions in the first segment and the third segment.

[0011] In an optional embodiment, when the moving contact and the stationary contact are closed, the current flow direction through the moving contact is opposite to the current flow direction through the first segment and the same as the current flow direction through the third segment. At least a portion of the first segment is located in the thickness direction of the moving contact and is disposed away from the side away from the moving contact. At least a portion of the third segment is located in the thickness direction of the moving contact and is close to the other side of the moving contact.

[0012] In an optional embodiment, a connecting portion is provided at the end of the moving contact away from the moving contact part;

[0013] The connecting part is provided with a mounting hole, and the housing is provided with a rotating shaft. The mounting hole and the rotating shaft are rotatably engaged; or, the connecting part is rotatably connected to the first segment.

[0014] In an optional embodiment, the first segment, the third segment, and the moving contact are all located on the same side of the rotating shaft.

[0015] In an optional embodiment, the contact assembly further includes a flexible element, wherein the end of the moving contact away from the moving contact portion is electrically connected to the first segment via the flexible element.

[0016] In an optional embodiment, the contact assembly further includes a first magnetizing element disposed on one side of the moving contact, and the third segment is located between the first magnetizing element and the bottom wall of the moving contact.

[0017] In an optional embodiment, the contact assembly further includes a second magnetizing element disposed on the top wall of the moving contact.

[0018] In an optional embodiment, the contact assembly further includes a third magnetizing element disposed on one side of the moving contact in the width direction.

[0019] In an optional embodiment, the contact assembly further includes a first magnetizing element, a second magnetizing element, and a third magnetizing element. The first magnetizing element is disposed on one side of the moving contact, the second magnetizing element is disposed on the top wall of the moving contact, and the third magnetizing element is disposed on one side of the moving contact in the width direction. When the moving contact and the stationary contact are closed, at least a portion of the top ends of the first magnetizing element and the third magnetizing element are not higher than the top wall of the moving contact in the direction from the stationary contact to the moving contact.

[0020] In an optional embodiment, the contact assembly further includes a fourth magnetizing element and / or a fifth magnetizing element disposed along the width direction of the moving contact;

[0021] At least two opposing fourth magnetizing elements are provided on both sides of the moving contact in the width direction;

[0022] The fifth magnetizing element is positioned opposite to the moving contact on both sides when the circuit is closed.

[0023] In an optional embodiment, the contact assembly further includes a second lead-out, one end of which is connected to the stationary contact and the other end extends to the outside of the housing. The first lead-out also includes a fourth segment, one end of which is connected to the third segment and the other end extends to the outside of the housing.

[0024] When the moving contact and the stationary contact are closed, the second lead-out member, the stationary contact, the moving contact, the first segment, the second segment, the third segment, and the fourth segment form an electrical circuit.

[0025] Secondly, the present invention provides a load switch, including a contact assembly as described in any of the foregoing embodiments.

[0026] In an optional embodiment, the load switch further includes an arc extinguishing assembly disposed on one side of the contact assembly. The arc extinguishing assembly includes a U-shaped mounting plate and arc extinguishing grid plates inserted into two side plates of the U-shaped mounting plate. The arc extinguishing grid plates are inclined.

[0027] Thirdly, this utility model provides an electricity meter, wherein the meter casing is provided with a load switch as described in the foregoing embodiments.

[0028] The beneficial effects of the contact assembly, load switch, and meter provided in this utility model embodiment include: when the moving contact and stationary contact are closed, the stationary contact, moving contact, first section, second section, and third section are connected in sequence to form an electrical circuit. By positioning at least a portion of the first section and the third section on both sides of the thickness direction of the moving contact in the closed state, the current flow direction through the first section is opposite to the current flow direction through the third section. This causes the magnetic field generated by the current through these two sections to exert a force on the moving contact towards the stationary contact, thereby preventing the moving and stationary contacts from separating due to repulsion in the event of a short circuit or other abnormal situation. This ensures stable contact between the moving and stationary contacts, improves the operational stability of the contact assembly, and enhances its ability to withstand short-circuit currents. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 A schematic diagram of the first embodiment of the load switch provided in this utility model;

[0031] Figure 2 This is a first-view structural diagram of the contact assembly provided in the present utility model embodiment;

[0032] Figure 3 This is a schematic diagram of the first embodiment of the contact assembly provided by this utility model from a second perspective.

[0033] Figure 4 A schematic diagram of the second embodiment of the load switch provided in this utility model;

[0034] Figure 5 One of the schematic diagrams of the contact assembly in the closed state according to the second embodiment of this utility model;

[0035] Figure 6 One of the schematic diagrams of the contact assembly in the open state according to the second embodiment of this utility model;

[0036] Figure 7 This is the second schematic diagram of the contact assembly in the closed state according to the second embodiment of the present utility model.

[0037] Figure 8 This is the second schematic diagram of the contact assembly in the open state according to the second embodiment of the present utility model.

[0038] Figure 9 This is a schematic diagram of the first view of the second embodiment of the contact assembly provided in this utility model.

[0039] Figure 10 This is a schematic diagram of the second embodiment of the contact assembly provided in this utility model from a second perspective.

[0040] Figure 11 A schematic diagram of the third embodiment of the contact assembly provided in this utility model.

[0041] Icons: 1-Load switch; 10-Contact assembly; 100-Housing; 110-Shaft; 200-Stationary contact; 300-Moving contact; 310-Top wall; 320-Bottom wall; 330-Moving contact; 340-Connecting part; 400-First magnetizing component; 410-First magnetizing part; 420-Second magnetizing part; 500-Second magnetizing component; 600-Third magnetizing component; 700-First lead-out component; 710-First section; 720-Second section; 730-Third section; 740-Fourth section; 800-Second lead-out component; 900-Flexible component; 1000-Fourth magnetizing component; 1100-Fifth magnetizing component; 20-Arc extinguishing assembly; 22-U-shaped mounting plate; 23-Arc extinguishing grid. Detailed Implementation

[0042] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0043] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0044] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0045] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product is usually placed during use, they are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model.

[0046] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0047] It should be noted that, where there is no conflict, the features in the embodiments of this utility model can be combined with each other.

[0048] To ensure the safe operation of electrical systems, electrical devices with reliable current-carrying, current-connecting, and current-disconnecting capabilities are typically installed. Furthermore, these devices can also perform current-connecting, current-carrying, and current-disconnecting functions in the event of abnormal circuit faults (such as short circuits).

[0049] However, the closing state of existing electrical devices, such as the moving and stationary contacts 200 of load switches, is unstable. They are prone to contact repulsion under abnormal circuit fault conditions, which not only leads to unstable operation of the power system, but may also cause safety hazards.

[0050] To address the problems existing in the prior art, this utility model provides a contact assembly 10 for use in electrical equipment, such as circuit breakers and load switches. The contact assembly 10 provided by this utility model enhances the contact force between the moving contact 300 and the stationary contact 200 in the closed state, thereby ensuring stable contact between the moving contact 300 and the stationary contact 200, effectively improving the operational stability and short-circuit current withstand capability of the contact assembly 10.

[0051] For details, please refer to Figures 1 to 11 The contact assembly 10 includes a housing 100, a stationary contact 200, a first lead-out member 700, and a moving contact 300.

[0052] The stationary contact 200 is disposed in the housing 100; the first lead-out member 700 includes a first segment 710, a second segment 720 and a third segment 730 connected in sequence; one end of the moving contact 300 is provided with a moving contact portion 330, which is used to contact or separate from the stationary contact 200, and the other end is connected to the first segment 710. When the moving contact 300 and the stationary contact 200 are closed, at least a portion of the first segment 710 and at least a portion of the third segment 730 are respectively located on both sides of the thickness direction of the moving contact 300, and the current flow direction through the first segment 710 is opposite to the current flow direction through the third segment 730.

[0053] First, it should be noted that the moving contact 300 is usually provided with a mounting plane, and the moving contact 330 can be mounted on the mounting plane of the moving contact 300 by welding or other processes. Based on this, the "thickness direction of the moving contact 300" mentioned in the embodiments of this utility model refers to the direction perpendicular to the mounting plane on which the moving contact 300 is used to mount the moving contact 330. Therefore, it can be further understood that the "width direction of the moving contact 300" refers to the direction parallel to the mounting plane on which the moving contact 300 is used to mount the moving contact 330 and perpendicular to the length direction of the moving contact 300.

[0054] In this embodiment, when the moving contact 300 and the stationary contact 200 are closed, the stationary contact 200, the moving contact 300, the first segment 710, the second segment 720, and the third segment 730 form an electrical circuit. Therefore, when the current flows sequentially through the stationary contact 200, the moving contact 300, the first segment 710, the second segment 720, and the third segment 730, respectively, are located on both sides of the thickness direction of the moving contact 300, i.e., the first segment 710 and the second segment 720 of the first lead-out member 700. The first segment 710 and the third segment 730 are roughly C-shaped, so that the current flow direction through the first segment 710 is opposite to the current flow direction through the third segment 730. This makes the magnetic field generated by the current through these two segments exert a force on the moving contact 300 towards the stationary contact 200, thereby avoiding the repulsive force between the moving and stationary contacts 200 and separation in the event of abnormal conditions such as short circuits. This ensures stable contact between the moving contact 300 and the stationary contact 200, improves the operational stability of the contact assembly 10 and its ability to withstand short-circuit current.

[0055] Specifically, the current flow through the moving contact 300 is opposite to the current flow through the first segment 710, so that the current flow through the moving contact 300 is the same as the current flow through the third segment 730. In addition, the third segment 730 and the stationary contact 200 are located on the same side of the moving contact 300.

[0056] In addition, at least a portion of the first segment 710 is located in the thickness direction of the moving contact 300 and is disposed away from the side away from the moving contact 330, and at least a portion of the third segment 730 is located in the thickness direction of the moving contact 300 and is close to the other side of the moving contact 330.

[0057] It should also be noted that, in this embodiment, the current flow direction of the two is the same or opposite, which means that the two current flow directions are roughly parallel. That is, the current flow directions of the two can refer to a parallel relationship, or they can refer to a component that extends along the length of the moving contact 300. In this case, the current flow directions of the two can be set at a slight angle. In this embodiment, "one end" or "end" can refer to the end part, or it can refer to the part near the end or even adjacent to the middle.

[0058] Furthermore, a movable contact 330 is provided on the side of the movable contact 300 facing the third segment 730, and the movable contact 330 is used to connect with the stationary contact 200.

[0059] It is understandable that both the moving contact 330 of the moving contact 300 and the stationary contact 200 that come into contact with the stationary contact contain silver dots.

[0060] Furthermore, the contact assembly 10 also includes a second lead-out 800, one end of which is connected to the stationary contact 200 and the other end extends to the outside of the housing 100. The first lead-out 700 also includes a fourth segment 740, one end of which is connected to the third segment 730 and the other end extends to the outside of the housing 100.

[0061] It is worth mentioning that the second lead-out component 800 and the stationary contact 200 are integrally formed.

[0062] The fourth segment 740 of the first lead-out member 700 and the second lead-out member 800 are both used to connect to an external power source. Therefore, when the moving contact 300 and the stationary contact 200 are closed, the second lead-out member 800, the stationary contact 200, the moving contact 300, the first segment 710, the second segment 720, the third segment 730 and the fourth segment 740 form an electrical circuit.

[0063] Furthermore, the contact assembly 10 also includes a flexible element 900, and the end of the moving contact 300 away from the moving contact portion 330 is electrically connected to the first segment 710 through the flexible element 900.

[0064] It is understandable that the flexible component 900 can be, but is not limited to, flexible connecting wires.

[0065] In this embodiment, the first segment 710 is connected to the moving contact 300 via the flexible member 900, and the fourth segment 740 is used to connect to an external power source. Therefore, when the moving contact 300 and the stationary contact 200 are closed, the second lead-out member 800, the stationary contact 200, the moving contact 300, the flexible member 900, the first segment 710, the second segment 720, the third segment 730, and the fourth segment 740 are connected in sequence to form a conductive circuit.

[0066] The first segment 710 is located near the top wall 310 of the moving contact 300, and the third segment 730 is located near the bottom wall 320 of the moving contact 300. The first segment 710 and the third segment 730 are arranged in parallel, and the second segment 720 and the fourth segment 740 are arranged in parallel. When the moving contact 300 and the stationary contact 200 are closed, the current flow through the moving contact 300 and the current flow through the third segment 730 are in the same direction, which will generate an electric attraction force. However, the current flow through the moving contact 300 and the current flow through the first segment 710 are opposite, which will generate an electric repulsion force. Therefore, the magnetic field generated by the first segment 710 and the third segment 730 can further exert a force on the moving contact 300 to move closer to the stationary contact 200, thereby further increasing the contact force between the moving contact 300 and the stationary contact 200.

[0067] Furthermore, a connecting portion 340 is provided at the end of the moving contact 300 away from the moving contact 330; the connecting portion 340 is provided with a mounting hole, and the housing 100 is provided with a rotating shaft 110, with the mounting hole and the rotating shaft 110 rotatably engaged.

[0068] In this embodiment, the moving contact 300 is plate-shaped. One end of the moving contact 300 is provided with a moving contact portion 330, and the other end is connected to the first lead-out member 700 through a flexible member 900. The end of the moving contact 300 away from the moving contact portion 330 is also provided with a connecting portion 340, and rotates with the rotating shaft 110 through the mounting hole provided in the connecting portion 340. This allows the moving contact 300 to be rotatably disposed on the housing 100, so that the end of the moving contact 300 with the moving contact portion 330 can rotate around the rotating shaft 110. It can be seen that the contact assembly 10 provided by this utility model is a single-break contact structure.

[0069] Of course, in other embodiments of this utility model, the connecting portion 340 of the moving contact 300 can also be directly rotatably connected to the first segment 710. For example, the connecting portion 340 and the first segment 710 can be mechanically connected via a rotating shaft 110 for transmission, and can also serve as an electrical connection. Adjustments can be made according to actual needs, and no specific limitations are made here.

[0070] It is understandable that when the moving contact 300 is rotatably and electrically connected to the first segment 710 via the connecting part 340, the moving contact 300 can also be further electrically connected to the first segment 710 via the flexible member 900. In other words, there can be two electrical connections for current splitting.

[0071] Furthermore, the first segment 710 is located on one side of the movement path of the moving contact 300, so as to be staggered from the moving contact 300.

[0072] In this embodiment, the moving contact 300 is plate-shaped, and when the moving contact 300 is closed with the stationary contact 200, the moving contact 300 is generally horizontal. The first segment 710 is located on one side of the width direction of the moving contact 300 and is perpendicular to the moving contact 300, so that the first segment 710 and the moving contact 300 are staggered, thereby making way for the moving contact 300 so that it can move smoothly toward or away from the stationary contact 200.

[0073] Furthermore, in order to further improve the attraction force between the moving contact 300 and the stationary contact 200, the contact assembly 10 also includes at least one of a first magnetizing element 400, a second magnetizing element 500, and a third magnetizing element 600.

[0074] Specifically, the first magnetizing element 400 is disposed in the housing 100 and on one side of the moving contact 300. The third segment 730 is located between the first magnetizing element 400 and the bottom wall 320 of the moving contact 300.

[0075] Specifically, the bottom wall of the first magnetizing element 400 is located on the side of the third segment 730 away from the moving contact 300.

[0076] Furthermore, when the moving contact 300 and the stationary contact 200 are closed, the top of the first magnetizing member 400 is not higher than the top wall 310 of the moving contact 300 in the direction from the stationary contact 200 to the moving contact 300.

[0077] In this embodiment, by providing a first magnetizing element 400 on the side of the bottom wall 320 near the moving contact 300, an electromagnetic circuit is formed when the moving contact 330 of the moving contact 300 contacts and the stationary contact 200 to close the circuit. This causes the moving contact 300 to tend to move further toward the stationary contact 200, thereby increasing the contact force between the moving contact 300 and the stationary contact 200. This prevents the moving and stationary contacts 200 from separating due to repulsion in the event of an abnormal situation such as a short circuit, thus ensuring stable contact between the moving contact 300 and the stationary contact 200. As a result, the operational stability of the contact assembly 10 and its ability to withstand short-circuit current are effectively improved.

[0078] Furthermore, in the direction from the stationary contact 200 to the moving contact 300, the top of the first magnetizing member 400 is not higher than the bottom wall 320.

[0079] It is understandable that the first magnetizing component 400 is made of magnetically conductive material.

[0080] Furthermore, the first magnetizing component 400 includes a first magnetizing part 410 and a second magnetizing part 420. The first magnetizing part 410 is vertically disposed on one side of the moving contact 300 in the width direction, and the top of the first magnetizing part 410 is not higher than the top wall 310.

[0081] In this embodiment, the second magnetizing part 420 is connected to the first magnetizing part 410 in an L-shape, that is, the first magnetizing part 410 is located on the side of the moving contact 300, and the second magnetizing part 420 is located on the side of the bottom wall 320 near the moving contact 300.

[0082] Furthermore, the second magnetizing element 500 is disposed on the top wall 310.

[0083] In this embodiment, by attaching the second magnetizing element 500 to the top wall 310 of the moving contact 300, that is, by having the second magnetizing element 500 move synchronously with the moving contact 300, the electromagnetic attraction generated by the first magnetizing element 400 on both the moving contact 300 and the second magnetizing element 500 is simultaneously increased, thereby further increasing the contact force between the moving contact 300 and the stationary contact 200, thus ensuring stable contact between the moving contact 300 and the stationary contact 200, and further improving the operational stability of the contact assembly 10 and its ability to withstand short-circuit current.

[0084] Furthermore, the third magnetizing element 600 is disposed on one side of the moving contact 300 in the width direction.

[0085] Specifically, the first magnetizing member 400 includes a first magnetizing part 410, which is vertically disposed on one side of the moving contact 300 in the width direction. The top of the first magnetizing part 410 is not higher than the top wall 310. The third magnetizing member 600 is disposed opposite to the first magnetizing part 410 and is located on the side of the moving contact 300 away from the first magnetizing part 410.

[0086] In this embodiment, by providing a third magnetizing element 600 on the side of the moving contact 300 away from the first magnetizing part 410, the contact force between the moving contact 300 and the stationary contact 200 is further increased, thereby ensuring stable contact between the moving contact 300 and the stationary contact 200, and further improving the operational stability of the contact assembly 10 and its ability to withstand short-circuit current; in addition, the top of the third magnetizing element 600 is not higher than the top wall 310 of the moving contact 300.

[0087] It should be noted that either the second magnetizing element 500 or the third magnetizing element 600 can be arbitrarily set, or both can be set simultaneously. Preferably, the first magnetizing element 400, the second magnetizing element 500, and the third magnetizing element 600 are set simultaneously. For example, the first magnetizing element 400 is set on one side of the moving contact 300, the second magnetizing element 500 is set on the top wall 310 of the moving contact 300, and the third magnetizing element 600 is set on one side of the moving contact 300 in the width direction. The first magnetizing element 400 and the third magnetizing element 600 cooperate in a roughly U-shaped structure, and the moving contact 300 and the When the stationary contact 200 is closed, at least part of the top ends of the first magnetizing member 400 and the third magnetizing member 600 in the direction of the stationary contact 200 toward the moving contact 300 are not higher than the top wall 310 of the moving contact 300. Therefore, the first magnetizing member 400 and the third magnetizing member 600 will generate electromagnetic force on the moving contact 300 and also on the second magnetizing member 500, so as to further increase the contact force between the moving contact 300 and the stationary contact 200, thereby ensuring stable contact between the moving contact 300 and the stationary contact 200, and further improving the operating stability of the contact assembly 10 and its ability to withstand short-circuit current.

[0088] It is understandable that the second magnetizing element 500 and the third magnetizing element 600 are also made of magnetically conductive materials.

[0089] Furthermore, such as Figure 11 As shown, in other embodiments of the present invention, the contact assembly 10 further includes at least one of a fourth magnetizing member 1000 and a fifth magnetizing member 1100 disposed along the width direction of the moving contact 300; at least two opposing fourth magnetizing members 1000 are disposed on both sides of the moving contact 300 in the width direction; and / or the fifth magnetizing member 1100 is disposed on both sides of the moving contact 330 when the circuit is closed.

[0090] In summary, this utility model embodiment provides a contact assembly 10. When the moving contact 300 and the stationary contact 200 are closed, the stationary contact 200, the moving contact 300, the first segment 710, the second segment 720, and the third segment 730 form an electrical circuit. Therefore, by placing the first segment 710 and the third segment 730 on opposite sides of the thickness direction of the moving contact 300, i.e., the first segment 710, the second segment 720, and the third segment 730 of the first lead-out member 700 are approximately C-shaped, the current flow through the moving contact 300 is aligned with the current flow through the first segment 710. The current flows in opposite directions, so that the current flowing through the moving contact 300 is in the same direction as the current flowing through the third segment 730. In addition, the third segment 730 and the stationary contact 200 are located on the same side of the moving contact 300. This ensures that the magnetic field generated by the current flowing through these two segments exerts a force on the moving contact 300 toward the stationary contact 200, thereby preventing the moving and stationary contacts 200 from separating due to repulsion in the event of a short circuit or other abnormal situation. This ensures stable contact between the moving contact 300 and the stationary contact 200, improves the operational stability of the contact assembly 10 and its ability to withstand short-circuit current.

[0091] For further information, please refer to [link / reference]. Figure 1 The present invention also provides a load switch 1, including the contact assembly 10 as described in the above embodiments.

[0092] Furthermore, the load switch also includes an arc-extinguishing assembly 20. Specifically, the arc-extinguishing assembly 20 is disposed on one side of the contact assembly 10. The arc-extinguishing assembly 20 includes a U-shaped mounting plate 22 and an arc-extinguishing grid plate 23 inserted into the U-shaped mounting plate 22. The arc-extinguishing grid plate 23 is inclined so that it is close to the moving contact 330 and the stationary contact to facilitate arc ignition and extinguishing. The U-shaped mounting plate 22 can further prevent the arc from directly splashing onto the housing of the load switch 1.

[0093] Furthermore, this utility model also provides an electricity meter, including a load switch 1 as described in the above embodiments, which is disposed inside the meter casing.

[0094] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A contact assembly, characterized by, The application relates to a contact assembly. The contact assembly comprises a shell (100), a static contact (200) arranged in the shell (100), a first lead-out piece (700) comprising a first section (710), a second section (720) and a third section (730) connected in sequence, a moving contact (300) having a moving contact part (330) at one end for contacting or separating from the static contact (200) and connected with the first section (710) at the other end, wherein, when the moving contact (300) and the static contact (200) are closed, at least part of the first section (710) and at least part of the third section (730) are respectively located on both sides of the moving contact (300), and the current flow directions of the first section (710) and the third section (730) are opposite. When the moving contact (300) and the static contact (200) are closed, the current flow direction through the moving contact (300) is opposite to the current flow direction through the first section (710) and the same as the current flow direction through the third section (730), at least part of the first section (710) is located in the thickness direction of the moving contact (300) and away from the side of the moving contact part (330), and at least part of the third section (730) is located in the thickness direction of the moving contact (300) and close to the other side of the moving contact part (330). The moving contact (300) is provided with a connecting part (340) at the end away from the moving contact part (330). The connecting part (340) is provided with a mounting hole, the shell (100) is provided with a rotating shaft (110), the mounting hole is rotationally matched with the rotating shaft (110), or the connecting part (340) is rotationally connected with the first section (710).

2. The contact assembly of claim 1, wherein, The contact assembly further comprises a flexible piece (900), and the end of the moving contact (300) away from the moving contact part (330) is electrically connected with the first section (710) through the flexible piece (900).

3. The contact assembly of claim 1, wherein, The contact assembly further comprises a first magnetic enhancement piece (400) arranged on one side of the moving contact (300), and the third section (730) is located between the first magnetic enhancement piece (400) and the bottom wall (320) of the moving contact (300). The contact assembly further comprises a second magnetic enhancement piece (500) arranged on the top wall (310) of the moving contact (300).

4. The contact assembly of claim 1, wherein, The contact assembly further comprises a third magnetic enhancement piece (600) arranged on one side in the width direction of the moving contact (300).

5. The contact assembly of claim 1, wherein, ​ 6. The contact assembly of claim 1, wherein, ​ 7. The contact assembly of claim 1, wherein, ​ 8. The contact assembly of claim 1, wherein, The contact assembly further comprises a first magnetic enhancer (400), a second magnetic enhancer (500) and a third magnetic enhancer (600), the first magnetic enhancer (400) is arranged on one side of the movable contact (300), the second magnetic enhancer (500) is arranged on the top wall (310) of the movable contact (300), and the third magnetic enhancer (600) is arranged on one side of the movable contact (300) in the width direction, and at least part of the top end of the first magnetic enhancer (400) and the third magnetic enhancer (600) is not higher than the top wall (310) of the movable contact (300) in the direction of the static contact (200) towards the movable contact (300) when the movable contact (300) and the static contact (200) are closed.

9. The contact assembly of claim 1, wherein, The contact assembly further comprises a fourth magnetic enhancer (1000) and / or a fifth magnetic enhancer (1100) arranged in the width direction of the movable contact (300); At least two fourth magnetic enhancers (1000) are arranged on both sides of the movable contact (300) in the width direction; The fifth magnetic enhancer (1100) is arranged opposite to both sides of the movable contact (330) when closed.

10. The contact assembly of claim 1, wherein, The contact assembly further comprises a second lead-out piece (800), one end of the second lead-out piece (800) is connected with the static contact (200), and the other end extends to the outside of the shell (100), the first lead-out piece (700) further comprises a fourth section (740), one end of the fourth section (740) is connected with the third section (730), and the other end extends to the outside of the shell (100); When the movable contact (300) and the static contact (200) are closed, the second lead-out piece (800), the static contact (200), the movable contact (300), the first section (710), the second section (720), the third section (730) and the fourth section (740) form an electric circuit.

11. A load break switch characterized by The contact assembly comprises any one of claims 1-10.

12. The load break switch according to claim 11, characterized in that The load switch further comprises an arc extinguishing assembly (20) arranged on one side of the contact assembly, the arc extinguishing assembly (20) comprises a U-shaped mounting plate (22) and arc extinguishing blades (23) inserted into both side plates of the U-shaped mounting plate (22), and the arc extinguishing blades (23) are arranged obliquely.

13. An electricity meter characterized by The meter shell is provided with the load switch (1) of claim 11 or 12.

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