Load switch and ammeter

Abstract

The utility model provides a load switch and an ammeter, and relates to the technical field of electrical equipment. The load switch comprises a shell, a first static contact, a moving contact, a first leading-out piece and a second leading-out piece. The first static contact is arranged on the shell, and the first static contact is provided with a first static contact part; the moving contact is movably arranged on the shell, the moving contact is provided with a moving contact part, and the moving contact part is used for being in contact with or separated from the first static contact; the first leading-out piece is connected with the first static contact, at least parts of the first leading-out piece and the second leading-out piece are located on the two sides of the width direction of the movable contact part, and meanwhile the flow direction of current passing through the parts is opposite to the flow direction of current passing through the movable contact, so that the contact force between the movable contact and the static contact is increased. The operation stability of the contact assembly and the endurance capacity of short-circuit current are effectively improved, the first leading-out piece and the second leading-out piece are reasonable in design and simple in structure, and the production cost of the load switch is low.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology, and more specifically, to 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] Because moving and stationary contacts are prone to contact separation under abnormal circuit fault conditions such as abnormal current, the above problem can be alleviated by using current magnetization design or by adding magnets. However, the current electrical device design is usually unreasonable. Either the magnetization effect is limited and cannot make it operate stably, or although the magnetization effect can be achieved, its production cost is high. Utility Model Content

[0004] This utility model provides a load switch and meter, which has a simple structure, reasonable design, and low production cost. It can also generate an electromagnetic field force when the switch is closed to increase the contact force between the moving and stationary contacts. Therefore, it avoids the repulsive force between the moving and stationary contacts and separation under abnormal circuit fault conditions such as abnormal current, and ensures stable contact between the moving and stationary contacts. This effectively improves the operating stability of the contact assembly and the short-circuit current withstand capability.

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

[0006] In a first aspect, this utility model provides a load switch, comprising:

[0007] case;

[0008] A first stationary contact is disposed in the housing and has a first stationary contact portion.

[0009] A movable contact is movably disposed in the housing, and the movable contact is provided with a movable contact portion, which is used to contact or separate from the first stationary contact portion;

[0010] The first lead-out member includes a first segment extending along the thickness direction of the moving contact and a second segment extending along the length direction of the moving contact;

[0011] The second lead-out member includes a fifth segment extending along the length direction of the moving contact and a sixth segment extending along the thickness direction of the moving contact.

[0012] The second segment and the fifth segment are located on both sides of the width direction of the moving contact. In the closed state, the second segment, the first segment, the first stationary contact, the moving contact, the fifth segment, and the sixth segment form a conductive circuit, and the current flow direction through the second segment and the current flow direction through the fifth segment are opposite to the current flow direction through the moving contact.

[0013] In an optional embodiment, one end of the moving contact is provided with the moving contact portion, and the other end is rotatably disposed in the housing and connected to the fifth segment through the flexible member and / or clamping member.

[0014] In an optional embodiment, the first segment and the sixth segment are disposed opposite to each other on both sides of the first stationary contact portion.

[0015] In an optional embodiment, the first lead-out member further includes a third segment and a first lead-out end, wherein the first segment, the second segment, the third segment and the first lead-out end are connected in sequence, and the third segment extends along the thickness direction of the moving contact; the sixth segment is connected to the second lead-out end, and the first lead-out end and the second lead-out end are located on the same side of the moving contact.

[0016] In an optional embodiment, the moving contact includes a first contact portion and a second contact portion, wherein the first contact portion is used to contact or separate from the first stationary contact portion;

[0017] The second lead-out member also includes a fourth section connected to the fifth section, and the load switch also includes a second stationary contact connected to the fourth section. The second stationary contact is provided with a second stationary contact portion, which is used to contact or separate from the second contact portion.

[0018] In an optional embodiment, the first lead-out member further includes a third segment, the first segment, the second segment and the third segment are connected in sequence, the third segment extends along the thickness direction of the moving contact, the third segment is used to connect to an external power source or wire, the first segment and the sixth segment are located on both sides of the first stationary contact, and the third segment and the fourth segment are located on both sides of the second stationary contact.

[0019] In an optional implementation, in the closed state, the second segment and the fifth segment are located on the side of the moving contact away from the first stationary contact.

[0020] In an optional implementation, in the closed state, at least a portion of the bottom wall of the second and / or fifth section is not lower than the bottom wall of the moving contact.

[0021] In an optional embodiment, the load switch further includes a magnetizing element, which is disposed on one or both sides of the moving contact in the width direction when the moving contact is in contact with the first stationary contact.

[0022] In an optional embodiment, at least one magnetizing element is respectively disposed on both sides of the moving contact in the width direction.

[0023] Secondly, this utility model provides an electricity meter, including a load switch as described in any of the foregoing embodiments.

[0024] The beneficial effects of the load switch and meter provided in this utility model embodiment include: by ensuring that the conductive circuit formed by the second section, the first section, the first stationary contact, the moving contact, the fifth section, and the sixth section has the current flow direction through the second section and the fifth section being opposite to the current flow direction through the moving contact, the magnetic field generated by the second and fifth sections effectively acts on the moving contact, thereby increasing the contact force between the moving and stationary contacts. This prevents the moving and stationary contacts from separating due to repulsion under abnormal circuit fault conditions such as abnormal current, ensuring stable contact between the moving and stationary contacts, and effectively improving the operational stability of the contact assembly and its short-circuit current withstand capability. Therefore, the load switch provided by this utility model can effectively achieve the magnetization effect through the reasonable design of the first and second leads, and its simple structure also results in low production costs. Attached Figure Description

[0025] 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.

[0026] Figure 1 One of the structural schematic diagrams of the first embodiment of the load switch provided by this utility model;

[0027] Figure 2 A second schematic diagram of the first embodiment of the load switch provided in this utility model;

[0028] Figure 3 One of the structural schematic diagrams of the second embodiment of the load switch provided in this utility model;

[0029] Figure 4 This is the second schematic diagram of the structure of the load switch provided in the embodiment of the present utility model;

[0030] Figure 5The third schematic diagram of the second embodiment of the load switch provided in this utility model;

[0031] Figure 6 The fourth schematic diagram of the second embodiment of the load switch provided in this utility model.

[0032] Icons: 10-Load switch; 100-House; 200-First stationary contact; 210-First stationary contact portion; 300-Moving contact; 310-Moving contact portion; 311-First contact portion; 312-Second contact portion; 400-First lead-out; 410-First segment; 420-Second segment; 430-Third segment; 440-First lead-out terminal; 500-Second lead-out; 510-Fourth segment; 520-Fifth segment; 530-Sixth segment; 540-Second lead-out terminal; 600-Flexible component; 700-Magnetic component; 800-Second stationary contact; 810-Second stationary contact portion. Detailed Implementation

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0038] 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.

[0039] 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).

[0040] Because moving and stationary contacts are prone to contact separation under abnormal circuit fault conditions such as abnormal current, the above problem can be alleviated by using current magnetization design or by adding magnets. However, the current electrical device design is usually unreasonable. Either the magnetization effect is limited and cannot make it operate stably, or although the magnetization effect can be achieved, its production cost is high.

[0041] Based on the problems existing in the current technology, please refer to Figure 1 and Figure 2 This utility model provides a load switch 10, which is applied to electricity meters and other related electrical equipment. The load switch 10 provided by this utility model is not only simple in structure and reasonable in design, but also has low production cost. Furthermore, it can generate an electromagnetic field force when the circuit is closed to increase the contact force between the moving and stationary contacts. This prevents the moving and stationary contacts from separating due to repulsion under abnormal circuit fault conditions such as abnormal current, ensuring stable contact between the moving contact 300 and the stationary contact. This effectively improves the operational stability of the contact assembly and its short-circuit current withstand capability.

[0042] In detail, the load switch 10 includes a housing 100, a first stationary contact 200, a moving contact 300, a first lead-out member 400, and a second lead-out member 500.

[0043] First, it should be noted that the shell 100 has a rectangular cubic structure. Figure 1 The middle shell 100 is for illustration only and does not represent the actual specific structure and size of the shell 100.

[0044] The first stationary contact 200 is disposed in the housing 100 and has a first stationary contact portion 210; the moving contact 300 is movably disposed in the housing 100 and has a moving contact portion 310, which is used to contact or separate from the first stationary contact portion 210; the first lead-out member 400 includes a first segment 410 extending along the thickness direction of the moving contact 300 and a second segment 420 extending along the length direction of the moving contact 300; the second lead-out member 500 includes a fifth segment 520 extending along the length direction of the moving contact 300 and a sixth segment 530 extending along the thickness direction of the moving contact 300.

[0045] First, it should be noted that the moving contact 300 is usually provided with a mounting plane, and the moving contact 310 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" 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 310. 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 310 and perpendicular to the length direction of the moving contact.

[0046] Therefore, when the moving contact 310 is in contact with the first stationary contact 210, that is, when the moving contact 300 is closed with the stationary contact, the conductive circuit formed by the sequential connection of the second segment 420, the first segment 410, the first stationary contact 200, the moving contact 300, the fifth segment 520, and the sixth segment 530 is such that the current flow direction through the second segment 420 and the fifth segment 520 are opposite to the current flow direction through the moving contact 300, so that the magnetic field generated by the second segment 420 and the fifth segment 520 can effectively act on the moving contact 300, thereby increasing the contact force between the moving contact 300 and the stationary contact. This avoids the repulsive force between the moving contact 300 and the stationary contact and separation under abnormal circuit fault conditions such as abnormal current, ensuring stable contact between the moving contact 300 and the stationary contact, and effectively improving the operational stability of the contact assembly and the short-circuit current withstand capability.

[0047] It should also be noted that the current flow direction of the two mentioned in this embodiment is the same or opposite, which means that the two current flow directions are roughly parallel. That is, the current flow direction of the two can refer to a parallel relationship, or it can refer to that they have a component along the extension direction of the moving contact. In this case, the current flow direction of the two can be set at a certain angle.

[0048] It can be seen that the load switch 10 provided by this utility model can effectively achieve the magnetization effect by reasonably designing the structure of the first lead-out member 400 and the second lead-out member 500. Due to its simple structure, it also has low production cost.

[0049] It is worth mentioning that the first stationary contact 200 and the first lead-out part 400 are integrally formed.

[0050] Furthermore, the load switch 10 also includes a flexible element 600, one end of the moving contact 300 is provided with a moving contact portion 310, and the other end is rotatably disposed in the housing 100 and connected to the fifth segment 520 through at least one of the flexible element 600 or the clamping element.

[0051] In this embodiment, the load switch 10 has a single-break structure, that is, one end of the moving contact 300 is provided with a moving contact 310, and the other end is rotatably disposed in the housing 100, and the other end is also connected to the fifth segment 520 through a flexible member 600.

[0052] Optionally, the flexible element 600 may be, but is not limited to, a flexible connecting wire.

[0053] Furthermore, the first lead-out member 400 includes a third segment 430. The first segment 410, the second segment 420 and the third segment 430 are connected in sequence. The first segment 410 is connected to the first stationary contact 200. When the circuit is closed, the second segment 420 is located on the side of the moving contact 310 away from the first stationary contact 210, and the current flow through the second segment 420 is opposite to the current flow through the moving contact 300. The third segment 430 is used to connect to an external power source or wire.

[0054] In this embodiment, the first segment 410 and the sixth segment 530 are located on both sides of the first stationary contact portion 210.

[0055] It should be noted that the first lead-out component 400 also includes a first lead-out end 440. One end of the first lead-out end 440 is connected to the third segment 430, and the other end is used to extend out of the housing 100 to connect to an external power source or wire.

[0056] In this embodiment, when the moving contact 300 and the first stationary contact 200 are closed, the second lead-out member 500, the moving contact 300, the first stationary contact 200, the first segment 410, the second segment 420, the third segment 430, and the first lead-out terminal 440, by making the current flow direction through the second segment 420 opposite to the current flow direction through the moving contact 300, so that the magnetic field generated by the second segment 420 acts on the moving contact 300, thereby increasing the contact force between the moving contact 300 and the stationary contact.

[0057] Specifically, the first segment 410, the second segment 420, and the third segment 430 are located in the same vertical plane, and the first segment 410, the second segment 420, and the third segment 430 form a U-shaped structure.

[0058] Furthermore, the second lead-out member 500 includes a fourth segment 510, a fifth segment 520, and a sixth segment 530 connected in sequence. The fourth segment 510 is used to connect with the moving contact 300. The fifth segment 520 is located at the end of the moving contact 310 away from the stationary contact, and the current flow through the fifth segment 520 is opposite to the current flow through the moving contact 300. The sixth segment 530 is used to connect with an external power source or wire.

[0059] In this embodiment, the second lead-out member 500 further includes a second lead-out terminal 540. One end of the second lead-out terminal 540 is connected to the sixth segment 530, and the other end is used to extend out of the housing 100 to connect to an external power source or wire. Therefore, when the moving contact 310 of the moving contact 300 contacts the first stationary contact 210 of the stationary contact, the second lead-out terminal 540, the sixth segment 530, the fifth segment 520, the fourth segment 510, the moving contact 300, the first stationary contact 200, the first segment 410, the second segment 420, the third segment 430, and the first lead-out terminal 440 are sequentially connected to form a conductive circuit. By making the current flow direction through the fifth segment 520 opposite to the current flow direction through the moving contact 300, the magnetic field generated by the fifth segment 520 acts on the moving contact 300, thereby increasing the contact force between the moving contact 300 and the stationary contact.

[0060] The fourth segment 510 facilitates the connection between the moving contact 300 and the second lead-out member 500. For example, one end of the flexible member 600 can be welded to the fixed end of the moving contact 300, and one end of the flexible member 600 can be welded to the fourth segment 510.

[0061] Specifically, the fourth segment 510 is located directly above the moving contact 300, the fifth segment 520 and the sixth segment 530 are located in the same vertical plane, and the fifth segment 520 and the sixth segment 530 are L-shaped.

[0062] Furthermore, the planes containing the fifth segment 520 and the sixth segment 530 are parallel to the planes containing the first segment 410, the second segment 420, and the third segment 430, and are located on both sides of the width direction of the moving contact 300, respectively. Therefore, the second segment 420 and the fifth segment 520 are arranged opposite to each other on both sides of the first stationary contact 200 and the moving contact 300. In other words, the second segment 420 and the fifth segment 520 are arranged opposite to each other on both sides of the plane containing the movement path of the moving contact 300.

[0063] Furthermore, the first lead-out member 400 also includes a third segment 430 and a first lead-out terminal 440. The first segment 410, the second segment 420, the third segment 430 and the first lead-out terminal 440 are connected in sequence. The third segment 430 extends along the thickness direction of the moving contact 300. The sixth segment 530 is connected to the second lead-out terminal 540. The first lead-out terminal 440 and the second lead-out terminal 540 are located on the same side of the moving contact 300. The spatial layout of the load switch is more reasonable, which facilitates the wiring of the load switch with external equipment.

[0064] Specifically, the second segment 420 and the fifth segment 520 are located on the side of the moving contact 300 away from the first stationary contact 210 when the circuit is closed.

[0065] Furthermore, when the moving contact 310 is in contact with the first stationary contact 210, in the vertical height direction of the housing 100, the bottom wall of at least one of the second segment 420 and at least one of the fifth segment 520 is not lower than the bottom wall of the moving contact 300. In this embodiment, "bottom wall" refers to the side closer to the first stationary contact 210 along the thickness direction.

[0066] Furthermore, the bottom walls of the second segment 420 and the fifth segment 520 are not lower than the top wall of the moving contact 300, that is, the projections of the three along the width direction of the moving contact 300 do not overlap, so as to further improve the short-circuit current withstand capability.

[0067] Furthermore, the load switch 10 also includes a magnetizing element 700, which is disposed on one or both sides of the moving contact 300 in the width direction when the moving contact 310 is in contact with the first stationary contact 210.

[0068] Preferably, at least one magnetizing element 700 is provided on both sides of the moving contact 300 in the width direction, and the two are arranged opposite to each other. Specifically, one magnetizing element 700 is located on the same side of the moving contact 300 as the first lead-out element 400, that is, the magnetizing element 700 is approximately located on the same plane as the first segment 410, the second segment 420, and the third segment 430, and since the first segment 410, the second segment 420, and the third segment 430 are U-shaped, the magnetizing element 700 is located inside the U-shape formed between the first segment 410, the second segment 420, and the third segment 430; the other magnetizing element 700 is located on the same side of the moving contact 300 as the second lead-out element 500, that is, the magnetizing element 700 is approximately located on the same plane as the fourth segment 510 and the fifth segment 520, and since the fifth segment 520 and the sixth segment 530 are L-shaped, the magnetizing element 700 is located in the concave part of the L-shape.

[0069] Therefore, by setting up the magnetizing element 700, the magnetizing element 700 reduces the magnetic resistance when the moving contact 300 and the first stationary contact 200 are in contact and closed, so that the moving contact 300 has a further tendency to move towards the first stationary contact 200, thereby further increasing the contact force between the moving contact 300 and the first stationary contact 200.

[0070] In detail, the magnetizing elements 700 are arranged in pairs, and the magnetizing elements 700 located on both sides of the moving contact 300 in the width direction are arranged opposite each other.

[0071] Of course, in other embodiments of the utility model, the load switch 10 can also have a double-break structure, such as... Figures 3 to 6As shown, the moving contact 310 includes a first contact portion 311 and a second contact portion 312. The first contact portion 311 is used to contact or separate from the first stationary contact portion 210.

[0072] The load switch 10 also includes a second stationary contact 800. Unlike the previous embodiment, the fourth segment 510 is connected to the second stationary contact 800. The second stationary contact 800 is provided with a second stationary contact portion 810, which is used to contact or separate from the second contact portion 312.

[0073] In this embodiment, the moving contact 300 is slidably disposed on the housing 100. A first contact portion 311 and a second contact portion 312 are respectively disposed at both ends of the moving contact 300, so that the first contact portion 311 and the second contact portion 312 of the moving contact 300 can contact the first stationary contact 200 and the second stationary contact portion 810 respectively. In this case, the second lead-out end 540, the sixth segment 530, the fifth segment 520, the fourth segment 510, the second stationary contact portion 810, the moving contact 300, the first stationary contact 200, the first segment 410, the second segment 420, the third segment 430 and the first lead-out end 440 can form a conductive circuit.

[0074] In this embodiment, the third segment 430 extends along the thickness direction of the moving contact 300. The third segment 430 is used to connect to an external power source or wire. The first segment 410 and the sixth segment 530 are located on both sides of the first stationary contact 210, and the third segment 430 and the fourth segment 510 are located on both sides of the second stationary contact 810.

[0075] Specifically, in this embodiment, the fourth segment 510, the fifth segment 520, and the sixth segment 530 are located on the same plane, and the plane on which the fourth segment 510, the fifth segment 520, and the sixth segment 530 are located is also parallel to the plane on which the first segment 410, the second segment 420, and the third segment 430 are located. The fourth segment 510, the fifth segment 520, and the sixth segment 530 are U-shaped.

[0076] It is worth mentioning that, in this embodiment, the magnetizing member 700, which is located on the same side as the second lead-out member 500, is located inside the U-shape formed by the fourth segment 510, the fifth segment 520, and the sixth segment 530.

[0077] In summary, this utility model embodiment provides a load switch 10. When the moving contact 310 is in contact with the first stationary contact 210, that is, when the moving contact 300 and the stationary contact are closed, the current can flow sequentially through the conductive circuit formed by the second section 420, the first section 410, the first stationary contact 200, the moving contact 300, the fifth section 520, and the sixth section 530. The current flow direction through the second section 420 and the fifth section 520 are opposite to the current flow direction through the moving contact 300, so that the magnetic field generated by the second section 420 and the fifth section 520 can effectively act on the moving contact 300, thereby increasing the contact force between the moving contact 300 and the stationary contact. This avoids the repulsive force between the moving contact 300 and the stationary contact and separation under abnormal circuit fault conditions such as abnormal current, ensuring stable contact between the moving contact 300 and the stationary contact, and effectively improving the operational stability of the contact assembly and the short-circuit current withstand capability.

[0078] Furthermore, this utility model embodiment also provides an electricity meter, including the load switch 10 in any of the above embodiments.

[0079] 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 load break switch characterized by, The utility model relates to a shell (100);First static contact (200) is arranged to the shell (100), and first static contact (200) is provided with first static contact part (210); Movable contact (300) is movably arranged to the shell (100), and movable contact (300) is provided with movable contact part (310), and movable contact part (310) is used to contact or separate with first static contact part (210); First lead-out piece (400) includes first section (410) extending along the thickness direction of movable contact (300) and second section (420) extending along the length direction of movable contact (300); Second lead-out piece (500) includes fifth section (520) extending along the length direction of movable contact (300) and sixth section (530) extending along the thickness direction of movable contact (300); Wherein, second section (420) and fifth section (520) are located on both sides of the width direction of movable contact (300) respectively, in the closing state, second section (420), first section (410), first static contact (200), movable contact (300), fifth section (520), sixth section (530) form the conductive loop, and the current flow direction through second section (420) and the current flow direction through fifth section (520) are opposite to the current flow direction through movable contact (300). One end of movable contact (300) is provided with movable contact part (310), and the other end is rotatably arranged to shell (100) and connected with fifth section (520) through flexible piece (600) and / or clamping piece. First section (410) and sixth section (530) are oppositely arranged on both sides of first static contact part (210).

2. The load break switch according to claim 1, characterized in that First lead-out piece (400) further includes third section (430) and first lead-out end (440), first section (410), second section (420), third section (430) and first lead-out end (440) are sequentially connected, third section (430) extends along the thickness direction of movable contact (300);Sixth section (530) is connected with second lead-out end (540), and first lead-out end (440) and second lead-out end (540) are located on the same side of movable contact (300).

3. The load break switch according to claim 2, characterized in that Movable contact part (310) includes first contact part (311) and second contact part (312), and first contact part (311) is used to contact or separate with first static contact part (210); 4. The load break switch according to claim 3, characterized in that ​ 5. The load break switch of claim 1, wherein, ​ The second lead-out piece (500) further comprises a fourth section (510) connected with the fifth section (520), and the load switch further comprises a second static contact (800) connected with the fourth section (510), wherein the second static contact (800) is provided with a second static contact part (810) for contacting or separating with the second contact part (312).

6. The load break switch according to claim 5, characterized in that The first lead-out piece (400) further comprises a third section (430), wherein the first section (410), the second section (420) and the third section (430) are sequentially connected, the third section (430) extends along the thickness direction of the movable contact (300), and the third section (430) is used for connecting with an external power supply or a wire; the first section (410) and the sixth section (530) are located on both sides of the first static contact part (210), and the third section (430) and the fourth section (510) are located on both sides of the second static contact part (810).

7. The load break switch according to any of claims 1-6, characterized in that In the closed state, the second section (420) and the fifth section (520) are located on the side of the movable contact (300) away from the first static contact part (210).

8. The load break switch according to claim 7, characterized in that In the closed state, at least part of the bottom wall of the second section (420) and / or the fifth section (520) is not lower than the bottom wall of the movable contact (300).

9. The load break switch of claim 1, wherein, The load switch further comprises a magnetic enhancement piece (700), wherein in the state that the movable contact part (310) contacts with the first static contact part (210), the magnetic enhancement piece (700) is arranged on one side or both sides of the movable contact (300) in the width direction.

10. The load switch of claim 9, wherein, At least one magnetic enhancement piece (700) is arranged on each side of the movable contact (300) in the width direction.

11. An electricity meter, characterised in that The load switch comprises the load switch according to any one of claims 1-10.

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