Contact assembly, load switch and electricity meter

Abstract

The invention provides a contact assembly, a load switch and an electric meter, 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] The present invention relates to the technical field of electrical equipment, and in particular to a contact assembly, a load switch and an electric meter. Background Art

[0002] In order to ensure the safe operation of the power system, electrical devices with the ability to reliably connect, disconnect and carry normal current are usually configured in the system. In addition, these electrical devices can also realize the functions of connecting, carrying and disconnecting current in the case of abnormal circuit faults (such as short circuit).

[0003] However, the closing state of the moving and static contacts of existing electrical devices such as load switches is unstable, and the contacts are easily opened under abnormal circuit fault conditions, which not only leads to unstable operation of the power system, but also may cause safety hazards. Summary of the invention

[0004] The present invention provides a contact assembly, a load switch and an electric meter, which can enhance the contact force between a moving contact and a stationary contact in a closed state, thereby ensuring stable contact between the moving contact and the stationary contact, so as to effectively improve the operating stability of the contact assembly and the ability to withstand short-circuit current.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] In a first aspect, the present invention provides a contact assembly, comprising:

[0007] case;

[0008] A stationary contact, wherein the stationary contact is arranged on the housing;

[0009] A first lead-out member, the first lead-out member comprising a first section, a second section and a third section connected in sequence;

[0010] A moving contact, one end of the moving contact is provided with a moving contact portion for contacting or separating with the static contact, and the other end is connected to the first section. When the moving contact and the static contact are closed, at least part of the first section and at least part of the third section are respectively located on both sides of the moving contact, and the current flows in the first section and the third section in opposite directions.

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

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

[0013] The connecting portion is provided with a mounting hole, the housing is provided with a rotating shaft, and the mounting hole is rotatably matched with the rotating shaft; or, the connecting portion is rotatably connected to the first section.

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

[0015] In an optional embodiment, the contact assembly further comprises a flexible member, and an end of the moving contact away from the moving contact portion is electrically connected to the first section via the flexible member.

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

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

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

[0019] In an optional embodiment, the contact assembly further includes a first magnetizing member, a second magnetizing member and a third magnetizing member, the first magnetizing member is arranged on one side of the moving contact, the second magnetizing member is arranged on the top wall of the moving contact, the third magnetizing member is arranged on one side in the width direction of the moving contact, and when the moving contact and the static contact are closed, in the direction from the static contact to the moving contact, at least part of the top end of the first magnetizing member and the third magnetizing member is not higher than the top wall of the moving contact.

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

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

[0022] The fifth magnetizing member is relatively arranged at two sides of the moving contact portion when the switch is closed.

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

[0025] In a second aspect, the present invention provides a load switch, comprising a contact assembly as described in any one of the aforementioned embodiments.

[0026] In an optional embodiment, the load switch also includes an arc extinguishing assembly, which is arranged on one side of the contact assembly. The arc extinguishing assembly includes a U-shaped mounting plate and arc extinguishing grids plugged into two side plates of the U-shaped mounting plate, and the arc extinguishing grids are arranged at an angle.

[0027] In a third aspect, the present invention provides an electric meter, wherein a load switch as described in the above embodiment is provided in a meter case of the electric meter.

[0028] The beneficial effects of the contact assembly, load switch and electric meter provided by the embodiments of the present invention include: when the moving contact and the static contact are closed, the static contact, the moving contact, the first section, the second section and the third section are connected in sequence to form an electrical circuit, and by locating at least part 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 flowing through the first section is opposite to the current flowing through the third section, so that the magnetic field generated by the current passing through the two sections exerts a force on the moving contact to move toward the static contact, thereby avoiding the repulsive force between the moving and static contacts and separation when abnormal conditions such as short circuits occur, thereby ensuring stable contact between the moving contact and the static contact, and improving the operating stability of the contact assembly and the ability to withstand short-circuit currents. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 A schematic structural diagram of a first embodiment of a load switch provided in an embodiment of the present invention;

[0031] Figure 2 A schematic structural diagram of a first embodiment of a contact assembly provided by an embodiment of the present invention from a first viewing angle;

[0032] Figure 3 A schematic structural diagram of a first embodiment of a contact assembly provided by an embodiment of the present invention from a second viewing angle;

[0033] Figure 4 A schematic structural diagram of a second embodiment of a load switch provided in an embodiment of the present invention;

[0034] Figure 5 One of the structural schematic diagrams of the closing state of the second embodiment of the contact assembly provided by the embodiment of the present invention;

[0035] Figure 6 One of the schematic diagrams of the structure of the contact assembly in the open state according to the second embodiment of the present invention;

[0036] Figure 7 A second schematic diagram of the structure of the contact assembly in the closed state according to the second embodiment of the present invention;

[0037] Figure 8 The second schematic diagram of the structure of the contact assembly in the open state according to the second embodiment of the present invention;

[0038] Fig. 9 A schematic structural diagram of a second embodiment of a contact assembly provided by an embodiment of the present invention from a first viewing angle;

[0039] Fig.10 A schematic structural diagram of a second embodiment of a contact assembly provided by an embodiment of the present invention from a second viewing angle;

[0040] Fig.11 A schematic structural diagram of a third embodiment of a contact assembly provided in an embodiment of the present invention.

[0041] Icons: 1-load switch; 10-contact assembly; 100-housing; 110-rotating shaft; 200-static contact; 300-moving contact; 310-top wall; 320-bottom wall; 330-moving contact part; 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 DESCRIPTION

[0042] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can 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 invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0045] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0046] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0047] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0048] In order to ensure the safe operation of the power system, electrical devices with the ability to reliably connect, disconnect and carry normal current are usually configured in the system. In addition, these electrical devices can also realize the functions of connecting, carrying and disconnecting current in the case of abnormal circuit faults (such as short circuit).

[0049] However, the closing state of the moving and static contacts 200 of existing electrical devices such as load switches is unstable, and the contacts are easily opened under abnormal circuit fault conditions, which not only causes unstable operation of the power system, but also may cause safety hazards.

[0050] Based on the problems existing in the prior art, an embodiment of the present invention provides a contact assembly 10, which is applied to electrical equipment, such as circuit breakers, load switches, etc. The contact assembly 10 provided by the present invention can enhance the contact force between the moving contact 300 and the stationary contact 200 in the closed state, thereby ensuring that the moving contact 300 and the stationary contact 200 are in stable contact, so as to effectively improve the operating stability of the contact assembly 10 and the ability to withstand short-circuit current.

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

[0052] Among them, the static contact 200 is arranged on the shell 100; the first lead-out member 700 includes a first section 710, a second section 720 and a third section 730 connected in sequence; a dynamic contact part 330 is provided at one end of the dynamic contact 300, and the dynamic contact part 330 is used to contact or separate with the static contact 200, and the other end is connected to the first section 710, and when the dynamic 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 thickness direction of the dynamic contact 300, and the current flowing through the first section 710 is opposite to the current flowing through the third section 730.

[0053] First of all, it should be explained that a mounting plane is usually provided on the moving contact 300, and the moving contact part 330 can be installed on the mounting plane on the moving contact 300 by welding or other processes. On this basis, the "thickness direction of the moving contact 300" mentioned in the embodiment of the present invention refers to the direction perpendicular to the mounting plane of the moving contact 300 on which the moving contact part 330 is installed; therefore, it can be further understood that the "width direction of the moving contact 300" refers to the direction parallel to the mounting plane of the moving contact 300 on which the moving contact part 330 is installed, 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 section 710, the second section 720 and the third section 730 form an electrical circuit. Therefore, when the current flows through the stationary contact 200, the moving contact 300, the first section 710, the second section 720 and the third section 730 in sequence, the first section 710 and the third section 730 are respectively located on both sides of the thickness direction of the moving contact 300, that is, the first section 710, the second section 720 of the first lead-out member 700 are connected to the first lead-out member 700. 0 and the third section 730 are roughly C-shaped structures, so that the current flow direction through the first section 710 is opposite to the current flow direction through the third section 730, so that the magnetic field generated by the current passing through the two sections produces a force on the moving contact 300 to move toward the static contact 200, thereby avoiding repulsion and separation between the moving and static contacts 200 when abnormal conditions such as short circuits occur, thereby ensuring stable contact between the moving contact 300 and the static contact 200, and improving the operating stability of the contact assembly 10 and the ability to withstand short-circuit currents.

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

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

[0057] It should also be explained that the two current flows mentioned in this embodiment are the same or opposite, which means that: the two current flows are roughly parallel, that is, the current flows of the two can refer to a parallel relationship, or they can refer to a component along the length extension direction of the moving contact 300. At this time, the current flows of the two can be set at a slight angle; the "one end" or "end" mentioned in this embodiment can refer to the end, or it can refer to a part close to the end or even adjacent to the middle.

[0058] Furthermore, a moving contact portion 330 is provided on one side of the moving contact 300 facing the third section 730 , and the moving contact portion 330 is used to be connected to the stationary contact 200 .

[0059] It can be understood that the moving contact portion 330 of the moving contact 300 and the stationary contact portion of the stationary contact 200 both contain silver dots.

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

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

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

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

[0064] It can be understood that the flexible member 900 can be, but is not limited to, a soft connecting wire.

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

[0066] The first section 710 is located on the side close to the top wall 310 of the moving contact 300, and the third section 730 is located on the side close to the bottom wall 320 of the moving contact 300. The first section 710 and the third section 730 are arranged in parallel, and the second section 720 and the fourth section 740 are arranged in parallel. When the moving contact 300 and the static contact 200 are closed, the current flow direction passing through the moving contact 300 is the same as the current flow direction of the third section 730, which will generate an electric suction force, while the current flow direction of the moving contact 300 is opposite to the current flow direction of the first section 710, which will generate an electric repulsion force. Therefore, the magnetic field generated by the first section 710 and the third section 730 can further generate a force on the moving contact 300 to make it move close to the static contact 200, thereby further increasing the contact force between the moving contact 300 and the static contact 200.

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

[0068] In this embodiment, the moving contact 300 is plate-shaped, and a moving contact portion 330 is provided at one end of the moving contact 300, and the other end is connected to the first lead-out member 700 through a flexible member 900, and the end of the moving contact 300 away from the moving contact portion 330 is also provided with a connecting portion 340, and is rotatably matched with the rotating shaft 110 through a mounting hole provided in the connecting portion 340, so that the moving contact 300 can be rotatably set on the housing 100 so that the end of the moving contact 300 where the moving contact portion 330 is provided can rotate around the rotating shaft 110. It can be seen that the contact assembly 10 provided by the present invention is a single breakpoint contact structure.

[0069] Of course, in other embodiments of the present invention, the connecting portion 340 of the movable contact 300 may also be directly rotatably connected to the first section 710, for example, the connecting portion 340 and the first section 710 are mechanically connected to each other through the rotating shaft 110 for transmission, and further, may also serve as an electrical connection at the same time. Adjustments may be made according to actual needs, and no specific limitation is made here.

[0070] It can be understood that when the movable contact 300 is rotatably and electrically connected to the first section 710 through the connecting portion 340 , the movable contact 300 can be further electrically connected to the first section 710 through the flexible member 900 , that is, there can also be two electrical connections for current diversion.

[0071] Furthermore, the first section 710 is located at one side of the moving path of the moving contact 300 so as to be staggered with 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 static contact 200, the moving contact 300 is roughly in a horizontal state. The first section 710 is located on one side of the width direction of the moving contact 300 and is vertically arranged to the moving contact 300, so that the first section 710 and the moving contact 300 are staggered, thereby achieving the first section 710 giving way to the moving contact 300, so that it can move smoothly toward or away from the static 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 further includes at least one of a first magnetizing component 400 , a second magnetizing component 500 and a third magnetizing component 600 .

[0074] In detail, the first magnetizing member 400 is disposed on the housing 100 , and the first magnetizing member 400 is disposed on one side of the moving contact 300 . The third section 730 is located between the first magnetizing member 400 and the bottom wall 320 of the moving contact 300 .

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

[0076] When the moving contact 300 and the stationary contact 200 are closed, the top end 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, a first magnetizing component 400 is provided on one side of the bottom wall 320 close to the moving contact 300 to form an electromagnetic circuit when the moving contact portion 330 of the moving contact 300 contacts and closes with the stationary contact 200, so that the moving contact 300 has a tendency to move further toward the stationary contact 200, thereby increasing the contact force between the moving contact 300 and the stationary contact 200, and avoiding the repulsive force between the moving and stationary contacts 200 and separation when abnormal conditions such as short circuits occur, thereby ensuring that the moving contact 300 is in stable contact with the stationary contact 200, thereby effectively improving the operating stability of the contact assembly 10 and the ability to withstand short-circuit currents.

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

[0079] It can be understood that the first magnetizing component 400 is made of magnetic conductive material.

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

[0081] In this embodiment, the second magnetizing portion 420 is connected to the first magnetizing portion 410 to form an L shape, that is, the first magnetizing portion 410 is located on the side of the movable contact 300 , and the second magnetizing portion 420 is located on the side close to the bottom wall 320 of the movable contact 300 .

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

[0083] In this embodiment, the second magnetizing component 500 is attached to the top wall 310 of the moving contact 300, that is, the second magnetizing component 500 moves synchronously with the moving contact 300, so that the electromagnetic attraction force generated by the first magnetizing component 400 on the moving contact 300 and the second magnetizing component 500 at the same time can be further increased to further increase the contact force between the moving contact 300 and the static contact 200, thereby ensuring stable contact between the moving contact 300 and the static contact 200, and further improving the operating stability of the contact assembly 10 and the ability to withstand short-circuit currents.

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

[0085] Specifically, the first magnetizing component 400 includes a first magnetizing part 410, which is vertically arranged on one side of the width direction of the moving contact 300, and the top of the first magnetizing part 410 is not higher than the top wall 310. The third magnetizing component 600 is arranged 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, a third magnetizing component 600 is further provided on the side of the moving contact 300 away from the first magnetizing portion 410 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 the ability to withstand short-circuit currents; in addition, the top of the third magnetizing component 600 is not higher than the top wall 310 of the moving contact 300.

[0087] It should be noted that the second magnetizing component 500 and the third magnetizing component 600 can be set at any one, or the second magnetizing component 500 and the third magnetizing component 600 can be set at the same time; preferably, the first magnetizing component 400, the second magnetizing component 500 and the third magnetizing component 600 are set at the same time. For example, the first magnetizing component 400 is arranged on one side of the moving contact 300, the second magnetizing component 500 is arranged on the top wall 310 of the moving contact 300, and the third magnetizing component 600 is arranged on one side of the moving contact 300 in the width direction. The first magnetizing component 400 and the third magnetizing component 600 cooperate to form a roughly U-shaped structure, and the moving contact 300 and the third magnetizing component 600 are arranged at the same time. When the static contact 200 is closed, at least part of the top ends of the first magnetizing component 400 and the third magnetizing component 600 are not higher than the top wall 310 of the moving contact 300 in the direction of the static contact 200 toward the moving contact 300. Therefore, the first magnetizing component 400 and the third magnetizing component 600 will generate electromagnetic force on the moving contact 300 as well as the second magnetizing component 500, so as to further increase the contact force between the moving contact 300 and the static contact 200, thereby ensuring stable contact between the moving contact 300 and the static contact 200, and further improving the operating stability of the contact assembly 10 and the ability to withstand short-circuit currents.

[0088] It can be understood that the second magnetizing component 500 and the third magnetizing component 600 are also made of magnetic conductive materials.

[0089] Furthermore, if Fig.11 As shown, in other embodiments of the present invention, the contact assembly 10 also includes at least one of a fourth magnetizing component 1000 and a fifth magnetizing component 1100 arranged along the width direction of the moving contact 300; at least two relative fourth magnetizing components 1000 are arranged on both sides of the width direction of the moving contact 300; and / or the fifth magnetizing component 1100 is arranged on both sides of the moving contact part 330 when the switch is closed.

[0090] In summary, the embodiment of the present invention 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 section 710, the second section 720 and the third section 730 form an electrical circuit. Therefore, by locating the first section 710 and the third section 730 on both sides of the thickness direction of the moving contact 300, that is, the first section 710, the second section 720 and the third section 730 of the first lead-out member 700 are roughly in a C-shaped structure, so as to realize the current flow direction through the moving contact 300 and the current flow direction through the first section 710. In opposite directions, the direction of the current flowing through the moving contact 300 is the same as the direction of the current flowing through the third section 730. In addition, the third section 730 and the static contact 200 are located on the same side of the moving contact 300, so that the magnetic field generated by the two sections of current exerts a force on the moving contact 300 to move toward the static contact 200, thereby avoiding repulsion and separation between the moving and static contacts 200 when abnormal conditions such as short circuits occur, thereby ensuring stable contact between the moving contact 300 and the static contact 200, and improving the operating stability of the contact assembly 10 and the ability to withstand short-circuit currents.

[0091] For further information, please refer to Figure 1 The present invention also provides a load switch 1, comprising a contact assembly 10 as in the above embodiment.

[0092] Furthermore, the load switch also includes an arc extinguishing assembly 20. Specifically, the arc extinguishing assembly 20 is arranged on one side of the contact assembly 10, and the arc extinguishing assembly 20 includes a U-shaped mounting plate 22 and an arc extinguishing grid 23 plugged into the U-shaped mounting plate 22, and the arc extinguishing grid 23 is arranged obliquely, so that the arc extinguishing grid 23 is close to the moving contact part 330 and the static contact part to facilitate arc initiation and arc extinguishing, and the U-shaped mounting plate 22 can further prevent the arc from directly splashing onto the housing of the load switch 1.

[0093] Furthermore, the present invention also provides an electric meter, comprising the load switch 1 as in the above embodiment, which is arranged inside the casing of the electric meter.

[0094] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A contact assembly, characterized in that: include: Housing (100); A stationary contact (200), the stationary contact (200) being arranged on the housing (100); A first lead-out member (700), the first lead-out member (700) comprising a first section (710), a second section (720) and a third section (730) connected in sequence; A moving contact (300), wherein one end of the moving contact (300) is provided with a moving contact portion (330) for contacting or separating with the stationary contact (200), and the other end is connected to the first section (710). When the moving contact (300) and the stationary 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 currents of the first section (710) and the third section (730) flow in opposite directions.

2. The contact assembly according to claim 1, characterized in that: When the moving contact (300) and the stationary contact (200) are closed, the direction of current flowing through the moving contact (300) is opposite to the direction of current flowing through the first section (710), and is the same as the direction of current flowing through the third section (730); at least a portion of the first section (710) is located in the thickness direction of the moving contact (300) and is away from the side of the moving contact portion (330); and at least a portion of the third section (730) is located in the thickness direction of the moving contact (300) and is close to the other side of the moving contact portion (330).

3. The contact assembly according to claim 1, characterized in that: A connecting portion (340) is provided at one end of the moving contact (300) away from the moving contact portion (330); The connecting portion (340) is provided with a mounting hole, the housing (100) is provided with a rotating shaft (110), and the mounting hole is rotatably matched with the rotating shaft (110); or, the connecting portion (340) is rotatably connected to the first section (710).

4. The contact assembly according to claim 1, characterized in that: The contact assembly further comprises a flexible member (900), and one end of the moving contact (300) away from the moving contact portion (330) is electrically connected to the first section (710) via the flexible member (900).

5. The contact assembly according to claim 1, characterized in that: The contact assembly further comprises a first magnetizing member (400), wherein the first magnetizing member (400) is arranged on one side of the moving contact (300), and the third section (730) is located between the first magnetizing member (400) and the bottom wall (320) of the moving contact (300).

6. The contact assembly according to claim 1, characterized in that: The contact assembly further comprises a second magnetizing member (500), wherein the second magnetizing member (500) is arranged on the top wall (310) of the moving contact (300).

7. The contact assembly according to claim 1, characterized in that: The contact assembly further comprises a third magnetizing member (600), and the third magnetizing member (600) is arranged on one side in the width direction of the moving contact (300).

8. The contact assembly according to claim 1, characterized in that: The contact assembly further comprises a first magnetizing component (400), a second magnetizing component (500) and a third magnetizing component (600), wherein the first magnetizing component (400) is arranged on one side of the moving contact (300), the second magnetizing component (500) is arranged on the top wall (310) of the moving contact (300), and the third magnetizing component (600) is arranged on one side in the width direction of the moving contact (300), and when the moving contact (300) and the stationary contact (200) are closed, in the direction from the stationary contact (200) to the moving contact (300), at least part of the top ends of the first magnetizing component (400) and the third magnetizing component (600) are not higher than the top wall (310) of the moving contact (300).

9. The contact assembly according to claim 1, characterized in that: The contact assembly further comprises a fourth magnetizing member (1000) and / or a fifth magnetizing member (1100) arranged along the width direction of the moving contact (300); At least two fourth magnetizing components (1000) are arranged on both sides of the moving contact (300) in the width direction; The fifth magnetizing component (1100) is relatively arranged on two sides of the moving contact part (330) when the switch is closed.

10. The contact assembly according to claim 1, characterized in that The contact assembly further comprises a second lead-out member (800), one end of the second lead-out member (800) is connected to the stationary contact (200), and the other end extends to the outside of the housing (100); the first lead-out member (700) further comprises a fourth section (740), one end of the fourth section (740) is connected to the third section (730), and the other end extends to the outside of the housing (100); When the moving contact (300) and the stationary contact (200) are closed, the second lead-out piece (800), the stationary contact (200), the moving contact (300), the first section (710), the second section (720), the third section (730) and the fourth section (740) form an electrical circuit.

11. A load switch, characterized in that: The invention comprises a contact assembly as claimed in any one of claims 1 to 10.

12. The load switch according to claim 11, characterized in that: The load switch further comprises an arc extinguishing assembly (20), wherein the arc extinguishing assembly (20) is arranged on one side of the contact assembly, and the arc extinguishing assembly (20) comprises a U-shaped mounting plate (22) and an arc extinguishing grid (23) plugged into two side plates of the U-shaped mounting plate (22), wherein the arc extinguishing grid (23) is arranged obliquely.

13. An electric meter, characterized in that: A load switch (1) as claimed in claim 11 or 12 is arranged in a casing of the electric meter.

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