Electric meter

Abstract

An ammeter relates to the technical field of low-voltage apparatuses. The ammeter comprises a first housing, a load switch and a current detection element which are respectively arranged in the first housing, and a wiring terminal group arranged on the first housing. The wiring terminal group and the current detection element are arranged along a first direction, the load switch comprises a contact mechanism and a magnetic control mechanism which are arranged along a second direction, the first direction is perpendicular to the second direction, and the current detection element is arranged between the magnetic control mechanism and the wiring terminal group. The electric meter is reasonable in layout, the internal space of the electric meter can be effectively utilized, the line connection mode of the load switch can be simplified, and the working reliability of the electric meter is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of low-voltage electrical appliances, and in particular to an electric meter. Background Art

[0002] The load switch is a major component of today's smart meters. It is a control component that uses the interaction and relative movement of the electromagnetic coil and permanent magnet under the action of a drive control signal to close and open the contact mechanism. It can remain in the on or off state after the drive control signal disappears.

[0003] Electricity meters are becoming increasingly integrated, and integrating load switches into them has become a trend. However, the layout of existing components and load switches is illogical. This can lead to a large load switch overall. Furthermore, wiring between the load switch and the terminal blocks is complex and susceptible to interference from magnetic fields outside the meter. This can lead to unstable control of the load switch's magnetic system over the opening and closing of the load switch's contacts, making it prone to operational failures. Summary of the Invention

[0004] The object of the present invention is to provide an electric meter with a reasonable layout, which can effectively utilize the internal space of the electric meter, simplify the line connection method of the load switch, and improve the working reliability of the electric meter.

[0005] The embodiment of the present invention is achieved as follows:

[0006] One aspect of the present invention provides an electric meter comprising a first housing, a load switch and a current sensing element respectively disposed within the first housing, and a terminal block disposed on the first housing. The terminal block and the current sensing element are arranged along a first direction, the load switch comprises a contact mechanism and a magnetic control mechanism arranged along a second direction, the first and second directions being perpendicular to each other, and the current sensing element is disposed between the magnetic control mechanism and the terminal block. This electric meter has a rational layout, effectively utilizes the internal space of the meter, simplifies the wiring connection method of the load switch, and improves the operating reliability of the meter.

[0007] Optionally, the distance between the magnetic control mechanism and the first side wall of the first shell is greater than the distance between the contact mechanism and the first side wall, the first side wall is a side wall of the first shell distributed along the second direction, and the first side wall is close to the live wire group side of the terminal group.

[0008] Optionally, the magnetic control mechanism includes a coil, and the axis direction of the coil wound around the helical line is parallel to the first direction or the second direction.

[0009] Optionally, the load switch further includes an arc extinguishing chamber, the arc extinguishing chamber and the current detection element are arranged in sequence along the second direction, and the contact mechanism and the arc extinguishing chamber are arranged in sequence along the first direction.

[0010] Optionally, the load switch also includes a transmission assembly, which is respectively connected to the moving contact of the magnetic control mechanism and the contact mechanism; the transmission assembly includes a first transmission member, a second transmission member connected to the first transmission member, an adapter, and a connecting rod respectively connected to the second transmission member and the adapter; the magnetic control mechanism drives the first transmission member to move, the first transmission member can drive the adapter to move through the second transmission member and the connecting rod, and the movement of the adapter can drive the moving contact to move.

[0011] Optionally, the first transmission member is a transmission rod provided with first teeth, the magnetic control mechanism is used to drive the transmission rod to move, and the second transmission member is provided with second teeth meshing with the first teeth.

[0012] Optionally, the first transmission member is a swinging member, the magnetic control mechanism is used to drive the swinging member to move, the swinging member is provided with a clamping groove, the second transmission member is provided with a connecting member that cooperates with the clamping groove, or the second transmission member is provided with a clamping groove, and the swinging member is provided with a connecting member that cooperates with the clamping groove.

[0013] Optionally, the electric meter further includes a micro switch, which is arranged on one side of the transmission assembly. The movement of the transmission assembly acts on the micro switch to provide feedback on the working status of the contact mechanism.

[0014] Optionally, the microswitch is arranged on one side of the first transmission member, and the moving contact, microswitch, and magnetic control mechanism are arranged in sequence along the second direction; or the microswitch is arranged on one side of the connecting rod, and the moving contact and the microswitch are arranged in sequence along the third direction, and the first direction, the second direction, and the third direction are perpendicular to each other.

[0015] Optionally, the terminal group includes a first terminal, a second terminal, a third terminal and a fourth terminal arranged along the second direction; the moving contact of the contact mechanism is connected to the first terminal through a first connecting component, and the static contact of the contact mechanism is connected to the second terminal through a second connecting component; the first connecting component and the moving contact are connected to each other to form a U-shaped structure.

[0016] Optionally, the arc extinguishing chamber is located below the opening of the U-shaped structure, and the load switch further includes a magnetizing component, which is provided on a side of the moving contact of the contact mechanism where the contact point is provided.

[0017] The beneficial effects of the present invention include:

[0018] The electric meter provided in the present application includes a first shell, a load switch and a current detection element respectively arranged in the first shell, and a terminal group arranged on the first shell; the terminal group and the current detection element are arranged along a first direction, the load switch includes a contact mechanism and a magnetic control mechanism arranged along a second direction, the first direction and the second direction are arranged perpendicularly, and the current detection element is arranged between the magnetic control mechanism and the terminal group. The present application arranges the contact mechanism and the magnetic control mechanism along the second direction, arranges the terminal group and the current detection element along the first direction, and arranges the current detection element between the terminal group and the magnetic control mechanism. In this way, the terminal group is located on the outside of the load switch, which is convenient for wiring the load switch; the magnetic control mechanism and the contact mechanism are arranged side by side, which is conducive to the driving of the contact mechanism by the magnetic control mechanism; the current detection element is arranged between the magnetic control mechanism and the terminal group, which can facilitate the connection of the line connected to the contact mechanism through the current detection element and the terminal group, which can simplify the line wiring method and facilitate the shortening of the line arrangement. In this way, the problem of line instability caused by complex line connection in the prior art can be improved, thereby improving the working reliability of the electric meter. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 One of the structural schematic diagrams of the electric meter provided in an embodiment of the present invention;

[0021] Figure 2 The second structural diagram of the electric meter provided by the embodiment of the present invention;

[0022] Figure 3 The third structural diagram of the electric meter provided by the embodiment of the present invention;

[0023] Figure 4 A fourth structural diagram of an electric meter provided in an embodiment of the present invention;

[0024] Figure 5 One of the structural diagrams of the load switch and current detection element provided in an embodiment of the present invention;

[0025] Figure 6 The second structural diagram of the load switch and current detection element provided by the embodiment of the present invention;

[0026] Figure 7One of the structural diagrams of the load switch provided in an embodiment of the present invention;

[0027] Figure 8 The second structural diagram of the load switch provided by the embodiment of the present invention;

[0028] Figure 9 One of the structural schematic diagrams of the transmission assembly provided in an embodiment of the present invention;

[0029] Figure 10 The second structural diagram of the transmission assembly provided by the embodiment of the present invention;

[0030] Figure 11 The third structural diagram of the load switch provided by the embodiment of the present invention;

[0031] Figure 12 This is the fourth structural diagram of the load switch provided in an embodiment of the present invention.

[0032] Icons: 10-first shell; 20-load switch; 21-contact mechanism; 211-moving contact; 212-static contact; 22-magnetic control mechanism; 23-arc extinguishing chamber; 24-first connecting component; 25-second connecting component; 26-magnetizing component; 27-second shell; 28-transmission assembly; 281-first transmission component; 2811-first tooth; 2812-clamping groove; 282-second transmission component; 2821-second tooth; 2822-connecting component; 283-adapter; 284-connecting rod; 29-shielding cover; 30-current detection element; 40-terminal group; 41-first terminal; 42-second terminal; 43-third terminal; 44-fourth terminal; a-first direction; b-second direction; i-axis direction of the helix; 50-circuit board; 60-micro switch. DETAILED DESCRIPTION

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only 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 herein can 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 invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0035] 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, it does not need to be further defined or explained in subsequent drawings.

[0036] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is typically placed when in use. These terms are intended solely to facilitate the description of the present invention and simplify the description, and are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third," etc., are used solely to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0037] Furthermore, the terms "parallel" and "perpendicular" do not necessarily require that two components be absolutely parallel or absolutely perpendicular. Instead, they can be approximately parallel or approximately perpendicular. For example, when two components are arranged "parallel," it means that the positional relationship between the two components can be absolutely parallel or approximately parallel; when two components are arranged "perpendicular," it means that the positional relationship between the two components can be absolutely perpendicular or approximately perpendicular.

[0038] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0039] Please refer to Figure 1 and Figure 2 This embodiment provides an electric meter comprising a first housing 10, a load switch 20 and a current sensing element 30, each disposed within the first housing 10, and a terminal block 40 disposed on the first housing 10. The terminal block 40 and the current sensing element 30 are arranged along a first direction a. The load switch 20 includes a contact mechanism 21 and a magnetic control mechanism 22, which are arranged along a second direction b. The first direction a and the second direction b are perpendicular to each other. The current sensing element 30 is disposed between the magnetic control mechanism 22 and the terminal block 40. This electric meter has a rational layout, effectively utilizes the internal space of the meter, simplifies the wiring connection method of the load switch 20, and improves the operating reliability of the meter.

[0040] The electric meter includes a first housing 10, a load switch 20, a current sensing element 30, and a terminal block 40. In this embodiment, the load switch 20 and current sensing element 30 are both located within the first housing 10, while the terminal block 40 is located on one side of the first housing 10. It should be noted that the terminal block 40 is located on one side of the first housing 10 to facilitate wiring operations to components within the electric meter.

[0041] The load switch 20 includes a contact mechanism 21 and a magnetic control mechanism 22. The contact mechanism 21 includes a movable contact 211 and a stationary contact 212. When energized, the magnetic control mechanism 22 drives the movable contact 211 of the contact mechanism 21, thereby connecting or disconnecting the movable contact 211 and the stationary contact 212.

[0042] In this embodiment, the contact mechanism 21 and the magnetic control mechanism 22 are arranged side by side along the second direction b. Figure 2 As shown, this makes it easier for the magnetic control mechanism 22 to drive the moving contact 211 to move.

[0043] Furthermore, the terminal block 40 and the current detection element 30 are arranged along the first direction a, and the current detection element 30 is disposed between the magnetic control mechanism 22 and the terminal block 40. In the present application, the terminal block 40 and the current detection element 30 are arranged along the first direction a. Thus, when wiring is performed, when the line connected to the static contact 212 is connected to the terminal block 40, since the current detection element 30 is located between the magnetic control mechanism 22 and the terminal block 40, one end of the line is connected to the contact mechanism 21, and the other end can directly pass through the current detection element 30 and connect to the terminal block 40. This facilitates line connection, simplifies line arrangement, shortens line paths, and provides a more reasonable spatial layout within the first housing 10 of the electric meter.

[0044] To summarize, the electric meter provided in the present application includes a first shell 10, a load switch 20 and a current detection element 30 respectively arranged in the first shell 10, and a terminal group 40 arranged on the first shell 10; the terminal group 40 and the current detection element 30 are arranged along a first direction a, the load switch 20 includes a contact mechanism 21 and a magnetic control mechanism 22 arranged along a second direction b, the first direction a and the second direction b are arranged vertically, and the current detection element 30 is arranged between the magnetic control mechanism 22 and the terminal group 40. The present application arranges the contact mechanism 21 and the magnetic control mechanism 22 along the second direction b, arranges the terminal group 40 and the current detection element 30 along the first direction a, and arranges the current detection element 30 between the terminal group 40 and the magnetic control mechanism 22. In this way, the terminal group 40 is located on the outside of the load switch 20, which is convenient for wiring the load switch 20; the magnetic control mechanism 22 and the contact mechanism 21 are arranged side by side, which is convenient for the magnetic control mechanism 22 to drive the contact mechanism 21; the current detection element 30 is arranged between the magnetic control mechanism 22 and the terminal group 40, which can facilitate the line connected to the contact mechanism 21 to pass through the current detection element 30 and connect to the terminal group 40, which can simplify the line wiring method and can facilitate the shortening of the line arrangement. In this way, the problem of line instability caused by complex line connection in the prior art can be improved, thereby improving the working reliability of the electric meter.

[0045] like Figure 2 and Figure 3 As shown, in a feasible implementation, the distance between the magnetic control mechanism 22 and the first side wall of the first housing 10 is greater than the distance between the contact mechanism 21 and the first side wall. The first side wall is a side wall of the first housing 10 distributed along the second direction b, and the first side wall is close to the live wire group side of the terminal group 40. It should be noted that the terminal group 40 includes a live wire group and a neutral wire group arranged in sequence along the second direction b. The first side wall is a side wall distributed along the second direction b and close to the live wire group side of the terminal group 40, corresponding to Figure 1 and Figure 2 In the embodiment, the first side wall is the left side wall of the first shell 10 .

[0046] In other words, the magnetic control mechanism 22 is closer to the interior of the meter than the contact mechanism 21, while the contact mechanism 21 is closer to the left wall of the meter. In this application, the magnetic control mechanism 22 is positioned closer to the interior of the first housing 10. This allows the magnetic control mechanism 22 to better avoid interference from external magnetic fields, improve the load switch 20's anti-magnetic interference performance, and stabilize the operation of the contact mechanism 21.

[0047] In one embodiment, the magnetic control mechanism 22 comprises at least a coil, wherein the axis direction i of the coil wound around the helical line is aligned with the first direction a (eg Figure 12as shown) or parallel to the second direction b (as shown) Figure 7 As shown), specifically, the coil of the magnetic control mechanism 22 is wound along the coil frame, and its winding trajectory is a spiral line, and finally there is an axial direction i of the spiral line. In this way, the magnetic control mechanism 22 is more direct, more labor-saving and space-saving when driving the contact mechanism 21.

[0048] To facilitate extinguishing the arc generated when the moving contact 211 and the static contact 212 are opened as quickly as possible, thereby improving the operating reliability and service life of the contact mechanism 21, the load switch 20 of the present application may further include an arc extinguishing chamber 23. The arc extinguishing chamber 23 and the current detection element 30 are arranged in sequence along the second direction b, and the contact mechanism 21 and the arc extinguishing chamber 23 are arranged in sequence along the first direction a. The arc extinguishing chamber 23 is used to guide the arc therein and extinguish the arc.

[0049] The arc extinguishing chamber 23 is arranged near the moving contact 211 and the static contact 212. Of course, in order to facilitate the introduction of the arc into the arc extinguishing chamber 23, the load switch 20 can also include an arc striking plate arranged between the static contact 212 and the moving contact 211. One end of the arc striking plate is arranged near the moving contact 211 and the static contact 212, and the other end is connected to the arc extinguishing chamber 23, which is used to introduce the arc into the arc extinguishing chamber 23.

[0050] The arc extinguishing chamber 23 is located between the contact mechanism 21 and the terminal block 40 , so that the space below the contact mechanism 21 can be effectively utilized, thereby improving the compactness of the electric meter.

[0051] Optionally, the load switch 20 may further include a transmission assembly 28, which is connected to the magnetic control mechanism 22 and the moving contact 211 of the contact mechanism 21 respectively; Figure 9 and Figure 10 As shown, the transmission assembly 28 includes a first transmission member 281, a second transmission member 282 transmission-connected to the first transmission member 281, an adapter 283, and a connecting rod 284 respectively connected to the second transmission member 282 and the adapter 283; the magnetic control mechanism 22 drives the first transmission member 281 to move, and the first transmission member 281 can drive the adapter 283 to move through the second transmission member 282 and the connecting rod 284, and the movement of the adapter 283 can drive the moving contact 211 to move.

[0052] It should be noted that the magnetic control mechanism 22 drives the first transmission member 281 to move, the first transmission member 281 can drive the second transmission member 282 to move, the movement of the second transmission member 282 can drive the adapter 283 to move through the connecting rod 284, and the movement of the adapter 283 can drive the moving contact 211 to move, so that the opening and closing of the contact mechanism 21 can be realized.

[0053] The present application does not impose any specific restrictions on the structural forms of the first transmission member 281 and the second transmission member 282. For example, in a feasible implementation, Figure 9 As shown, the first transmission member 281 may be a transmission rod provided with first teeth 2811 , the magnetic control mechanism 22 is used to drive the transmission rod to move, and the second transmission member 282 is provided with second teeth 2821 meshing with the first teeth 2811 .

[0054] In this way, the magnetic control mechanism 22 drives the transmission rod to move, and the transmission rod can drive the second transmission member 282 to move through the engagement of the first teeth 2811 with the second teeth 2821 of the second transmission member 282 .

[0055] In another possible implementation, Figure 10 As shown, the first transmission member 281 can also be a swing member, and the magnetic control mechanism 22 is used to drive the swing member to move. The swing member is provided with a clamping groove 2812, and the second transmission member 282 is provided with a connecting member 2822 that cooperates with the clamping groove 2812, or the second transmission member 282 is provided with a clamping groove, and the swing member is provided with a connecting member that cooperates with the clamping groove. The specific clamping groove 2812 can be as follows Figure 10 The semi-enclosed groove shown can also be Figure 12 Closed slot shown.

[0056] In this way, the magnetic control mechanism 22 drives the swinging member to move. In one specific embodiment, a permanent magnet may be provided on the swinging member. Through the magnetic attraction of the permanent magnet, the magnet and the yoke are kept in the normally open or normally closed state of the corresponding contact mechanism 21. When triggered by a pulse electrical signal, the coil in the magnetic control mechanism 22 generates a closed magnetic flux in the opposite direction to the permanent magnet, so that the originally fitted magnet and the yoke form reverse magnetic poles, driving the swinging member to swing clockwise or counterclockwise. The swinging member can drive the second transmission member 282 to move through the cooperation of the clamping slot 2812 and the connecting member 2822, thereby realizing the state switching of the contact mechanism 21.

[0057] Of course, the above-mentioned matching manner of the first transmission member 281 and the second transmission member 282 is only an example and is not a limitation to the present application. In actual applications, any of the above-mentioned structural forms can be adopted, and other feasible structural forms can also be adopted.

[0058] Please refer to Figure 8 As shown, the electric meter also includes a micro switch 60, which is disposed on one side of the transmission assembly 28. The movement of the transmission assembly 28 acts on the micro switch 60, and the micro switch 60 is used to provide feedback on the operating status of the contact mechanism 21. This allows for better utilization of the space on the side of the transmission assembly 28 and avoids excessive space occupation of the load switch 20 by the micro switch 60.

[0059] Optionally, the micro switch 60 is disposed on one side of the first transmission member 281, and the moving contact 211, the micro switch 60, and the magnetic control mechanism 22 are arranged along the second direction b, as shown in FIG. Figure 12 or the micro switch 60 is provided on one side of the connecting rod 284, the moving contact 211 and the micro switch 60 are arranged in sequence along the third direction, the first direction a, the second direction b and the third direction are perpendicular to each other, as shown Figure 8 and Figure 9 shown.

[0060] In order to facilitate the control of components such as the load switch 20 and the current detection element 30, the electric meter may further include a circuit board 50 located in the first housing 10, and the load switch 20 and the current detection element 30 are both connected to the circuit board 50. Figure 4 and Figure 5 shown.

[0061] When the electric meter further includes a circuit board 50, the micro switch 60 may also be connected to the circuit board 50 and located between the circuit board 50 and the load switch 20. The micro switch 60 is used to feedback the on or off state of the load switch 20.

[0062] The micro switch 60 is arranged between the circuit board 50 and the load switch 20, and is arranged close to the contact mechanism 21. The contact mechanism 21 or the connecting rod 284 is driven to act on the micro switch 60, so that the micro switch 60 is actuated, and then the user can obtain the on or off signal of the load switch 20 according to the signal feedback of the micro switch 60.

[0063] Optionally, the terminal block group 40 includes a first terminal 41, a second terminal 42, a third terminal 43, and a fourth terminal 44 arranged along the second direction b. Furthermore, the first terminal 41 and the second terminal 42 constitute a live wire group. The movable contact 211 of the contact mechanism 21 is connected to the first terminal 41 via the first connecting assembly 24, and the stationary contact 212 of the contact mechanism 21 is connected to the second terminal 42 via the second connecting assembly 25. The first connecting assembly 24 and the movable contact 211 are interconnected to form a U-shaped structure.

[0064] The connection terminal group 40 is located on one side of the first housing 10. That is, the connection terminal group 40 is provided on one side of the first housing 10, so that it is more convenient to connect the connection terminal group 40.

[0065] The third terminal 43 and the fourth terminal 44 are connected through the third connecting component in a feasible implementation. The second connecting component 25 and the third connecting component are both arranged inside the current detection element 30, and the second connecting component 25 enters from the first end of the current detection element 30 and exits from the second end, while the third connecting component enters from the second end of the current detection element 30 and exits from the first end. In this way, the current directions of the second connecting component 25 and the third connecting component should be exactly opposite when passing through the current detection element 30.

[0066] After the moving contact 211 and the stationary contact 212 are connected, the current flowing through the moving contact 211 and the stationary contact 212 in the load switch 20 will pass through the second connecting component 25, through the interior of the current detection element 30, and then into the second terminal 42. At the same time, the third connecting component, which connects the third terminal 43 and the fourth terminal 44, and the current direction of the third connecting component is opposite to that of the second connecting component 25, is used to detect power theft and leakage through two circuits (i.e., the second connecting component 25 and the third connecting component) through the current detection element 30. Under normal circumstances, at the same time, the currents flowing through the two circuits in the center of the current detection element 30 are in opposite directions and of the same magnitude, and the sum of the magnetic flux in the current detection element 30 is approximately zero. However, when a line fault occurs, the two currents have different magnitudes, and the neutralized magnetic flux in the current detection element 30 is non-zero.

[0067] Of course, in other embodiments, the current detection element 30 and the third connecting component can be integrated into one body for leakage detection of the electric meter, which is not limited here.

[0068] In this embodiment, optionally, as Figure 3 and Figure 4 As shown, the projection of the current sensing element 30 along the first direction a onto the terminal block 40 covers at least a portion of the second terminal 42 and at least a portion of the third terminal 43. In other words, the projection of the current sensing element 30 along the first direction a onto the terminal block 40 covers at least the second terminal 42 and at least a portion of the third terminal 43. This shortens the circuit loop, resulting in a shorter line connection and lower resistance.

[0069] The first connection component 24 and the moving contact 211 are connected to form a U-shaped structure. In this embodiment, the first connection component 24 may include a first busbar and a flexible connector connected to the first busbar. One end of the first busbar is connected to one end of the flexible connector and the other end is connected to the first terminal 41. The other end of the flexible connector is connected to the end of the moving contact 211 away from the contact point, so that the moving contact 211 can swing to achieve contact or separation with the static contact 212. Figure 8As shown, the present application arranges the moving contact 211 of the load switch 20 and the first connecting component 24 into a U-shaped structure, so that the current flowing through the moving contact 211 and the first busbar are in opposite directions, thereby generating a repulsive force between the two, so that the moving contact 211 and the static contact 212 are further abutted, thereby enhancing the short-circuit resistance performance; further, the moving contact 211 is connected to the first terminal 41 through the first busbar and the flexible connector, which is also conducive to having sufficient space on the first busbar to set up manganese copper parts for detection, meeting the basic performance requirements of the electric meter, and making the electric meter space layout more compact. Of course, in other embodiments, the static contact 212 of the contact mechanism 21 can also be connected to the first terminal 41 through the first connecting component 24, and the moving contact 211 of the contact mechanism 21 can be connected to the second terminal 42 through the second connecting component 25, which is not limited here.

[0070] Alternatively, see Figure 6 and Figure 7 The arc extinguishing chamber 23 is located below the opening of the U-shaped structure. The load switch 20 further includes a magnetizing component 26 . The magnetizing component 26 is provided on a side of the moving contact 211 of the contact mechanism 21 where a contact point is provided.

[0071] It should be noted that the load switch 20 also includes the aforementioned magnetizing member 26 to further improve the short-circuit withstand performance of the load switch 20. The magnetizing member 26 is provided on the side of the movable contact 211 of the contact mechanism 21 where the contact point is provided. Thus, the provision of the magnetizing member 26 in the present application can improve the magnetic field, further reduce the electromotive force during short-circuit withstand, and enhance the short-circuit withstand performance.

[0072] In addition, in this embodiment, the arc extinguishing chamber 23 can be located in the semi-enclosed space formed by the U-shaped structure, so that the space of the load switch 20 can be effectively utilized.

[0073] In addition, in order to further enhance the short-circuit resistance performance of the load switch 20, the movable contact 211 of the load switch 20 of the present application can be provided with multiple, such as Figure 6 shown.

[0074] The load switch 20 further includes a second housing 27 for accommodating the contact mechanism 21 and the magnetic control mechanism 22 . The magnetizing member 26 can be disposed in the second housing 27 and located on a side of the movable contact 211 where the contact point is disposed.

[0075] In order to reduce the impact of the external environment on the load switch 20, Figure 11 As shown, a shielding cover 29 is further sleeved on the second housing 27 of the load switch 20 , and the shielding cover 29 is preferably U-shaped.

[0076] Furthermore, the shielding cover 29 at least covers the magnetic control mechanism 22 of the load switch 20. Figure 11 shown.

[0077] The foregoing description is merely an optional embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

[0078] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

Claims

1. An electric meter, characterized in that: The invention comprises a first housing (10), a load switch (20) and a current detection element (30) respectively arranged in the first housing (10), and a terminal block (40) arranged on the first housing (10); the terminal block (40) and the current detection element (30) are arranged along a first direction (a); the load switch (20) comprises a contact mechanism (21) and a magnetic control mechanism (22) arranged along a second direction (b); the first direction (a) and the second direction (b) are arranged perpendicularly; the current detection element (30) is arranged between the magnetic control mechanism (22) and the terminal block (40).

2. The electric meter according to claim 1, wherein: The distance between the magnetic control mechanism (22) and a first side wall of the first housing (10) is greater than the distance between the contact mechanism (21) and the first side wall, the first side wall being a side wall of the first housing (10) distributed along the second direction (b), and the first side wall being close to a live wire group side of the terminal group (40).

3. The electric meter according to claim 2, characterized in that The magnetic control mechanism (22) comprises a coil, wherein the axis direction (i) of the coil wound around the helical line is parallel to the first direction (a) or the second direction (b).

4. The electric meter according to any one of claims 1 to 3, characterized in that: The load switch (20) further includes an arc extinguishing chamber (23), wherein the arc extinguishing chamber (23) and the current detection element (30) are arranged in sequence along the second direction (b), and the contact mechanism (21) and the arc extinguishing chamber (23) are arranged in sequence along the first direction (a).

5. The electric meter according to any one of claims 1 to 3, characterized in that: The load switch (20) further includes a transmission assembly (28), wherein the transmission assembly (28) is respectively connected to the magnetic control mechanism (22) and the movable contact (211) of the contact mechanism (21); the transmission assembly (28) includes a first transmission member (281), a second transmission member (282) connected to the first transmission member (281), a switching member (283), and a connecting rod (284) respectively connected to the second transmission member (282) and the switching member (283); the magnetic control mechanism (22) drives the first transmission member (281) to move, the first transmission member (281) can drive the switching member (283) to move through the second transmission member (282) and the connecting rod (284), and the movement of the switching member (283) can drive the movable contact (211) to move.

6. The electric meter according to claim 5, characterized in that The first transmission member (281) is a transmission rod provided with first teeth (2811), the magnetic control mechanism (22) is used to drive the transmission rod to move, and the second transmission member (282) is provided with second teeth (2821) meshing with the first teeth (2811).

7. The electric meter according to claim 5, characterized in that The first transmission member (281) is a swing member, the magnetic control mechanism (22) is used to drive the swing member to move, the swing member is provided with a clamping groove (2812), the second transmission member (282) is provided with a connecting member (2822) that cooperates with the clamping groove (2812), or the second transmission member (282) is provided with a clamping groove, and the swing member is provided with a connecting member that cooperates with the clamping groove.

8. The electric meter according to claim 5, characterized in that The electric meter further comprises a micro switch (60), which is arranged on one side of the transmission assembly (28). The movement of the transmission assembly (28) acts on the micro switch (60) to provide feedback on the working state of the contact mechanism (21).

9. The electric meter according to claim 8, characterized in that The micro switch (60) is arranged on one side of the first transmission member (281), and the moving contact (211), the micro switch (60), and the magnetic control mechanism (22) are arranged in sequence along the second direction (b); or the micro switch (60) is arranged on one side of the connecting rod (284), and the moving contact (211) and the micro switch (60) are arranged in sequence along a third direction, and the first direction (a), the second direction (b), and the third direction are perpendicular to each other.

10. The electric meter according to claim 4, characterized in that The terminal group (40) comprises a first terminal (41), a second terminal (42), a third terminal (43) and a fourth terminal (44) arranged along the second direction (b); the movable contact (211) of the contact mechanism (21) is connected to the first terminal (41) via a first connecting component (24), and the stationary contact (212) of the contact mechanism (21) is connected to the second terminal (42) via a second connecting component (25); the first connecting component (24) and the movable contact (211) are connected to each other to form a U-shaped structure.

11. The electric meter according to claim 10, characterized in that The arc extinguishing chamber (23) is located below the opening of the U-shaped structure. The load switch (20) further includes a magnetizing component (26). The magnetizing component (26) is provided on a side of the movable contact (211) of the contact mechanism (21) where a contact point is provided.

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