CN222319030U - An electric meter - Google Patents

Abstract

The present application provides an electric meter, which relates to the technical field of low-voltage electrical appliances. The electric meter of the present application includes a load switch and a current detector arranged along a first direction. The load switch includes a magnetic drive component and a contact component. The contact component includes a static touch plate and a moving touch plate connected to the magnetic drive component. The magnetic drive component drives the moving touch plate to contact or separate with the static touch plate. The load switch also includes an arc extinguishing chamber arranged on one side of the static touch plate, and the arc extinguishing chamber is arranged close to the current detector. The electric meter provided by the present application solves the problem of unreasonable internal layout of the electric meter in the prior art and makes more full use of the internal space of the electric meter.

Description

Ammeter

Technical Field

The application relates to the technical field of piezoelectric devices, in particular to an ammeter.

Background

The load switch is an electric control device, and is an electric appliance that generates a predetermined step change in a controlled amount in an electric output circuit when a change in an input amount reaches a prescribed requirement. The load switch has the interaction relation between the control system and the controlled system, is usually applied to an automatic control circuit, and is actually an automatic switch which uses small current to control large current to operate, so that the load switch plays roles of automatic adjustment, safety protection, circuit switching and the like in the circuit. Because the load switch has unique electrical and physical characteristics in the control circuit, the load switch has the advantages of high insulation resistance in the off state and low on-state resistance in the on state, and the load switch has the advantages of high standardization degree, good universality, circuit simplification and the like, so that the load switch is widely applied to the fields of communication, automobiles, automatic control, household appliances and the like.

The existing electric meter is more and more integrated, and the load switch is integrated into the electric meter to become the development trend of the electric meter. The load switch used in the ammeter has higher performance requirements such as short tolerance index and the like, so that the load switch has a complex structure and a large volume, but the internal space of the ammeter is quite limited, secondly, the load switch is connected with the ammeter wiring terminal in the ammeter to monitor the ammeter condition and feed back in time, the ammeter wiring terminal is fixed in position, so that the load switch and the ammeter wiring are complex, the resistance of a conductive loop is high, and the load switch is also easily interfered by a magnetic field outside the ammeter, so that the control of a load switch magnetic system on or off a contact mechanism is unstable, therefore, the requirement of the performance index can be met while the volume of the load switch is reduced, and the load switch is simple in wiring mode with the ammeter, so that the load switch can be installed in the ammeter for normal use and has reasonable layout.

Disclosure of utility model

The application aims to overcome the defects in the prior art and provide the ammeter so as to solve the problem that the internal layout of the ammeter is unreasonable in the prior art and more fully utilize the internal space of the ammeter.

In order to achieve the above purpose, the technical scheme adopted by the embodiment of the application is as follows:

In one aspect of the embodiment of the application, an ammeter is provided, which comprises a load switch and a current detector, wherein the load switch and the current detector are arranged along a first direction, the load switch comprises a magnetic driving assembly and a contact assembly, the contact assembly comprises a static contact plate and a movable contact plate connected with the magnetic driving assembly, the magnetic driving assembly drives the movable contact plate to be contacted with or separated from the static contact plate, the load switch further comprises an arc extinguishing chamber arranged on one side of the static contact plate, and the arc extinguishing chamber and the current detector are arranged on the same side of the magnetic driving assembly.

As an implementation manner, the driving direction of the magnetic driving assembly is a second direction, so as to drive the movable touch plate to move along the second direction, the movable touch plate moves to contact with or separate from the static touch plate, and the first direction is perpendicular to the second direction.

As an embodiment, the load switch and the current detector are provided with a plurality of connection terminals on one side along the second direction, the plurality of connection terminals are sequentially arranged along the first direction, the plurality of connection terminals are respectively electrically connected with the load switch, and the contact assembly is positioned between the magnetic driving assembly and the connection terminals.

As an embodiment, the connection terminals include a first connection terminal, a second connection terminal, a third connection terminal, and a fourth connection terminal, which are sequentially disposed along an arrangement direction of the load switch and the current detector, the movable contact plate is connected with the first connection terminal through a first connection member, the stationary contact plate is connected with the second connection terminal through a second connection member, the third connection terminal and the fourth connection terminal are electrically connected through a conductive member and pass through the current detector, and the first connection member is provided with a manganese copper plate.

As an embodiment, the first connection element is located on the side of the load switch facing away from the current detector, and is electrically connected to the first connection terminal.

As an implementation mode, the movable contact plate is connected with the magnetic driving assembly through the contact support, the contact assembly further comprises a rotating assembly, the movable contact plate comprises at least two movable contact plates, one end of each movable contact plate is connected with the rotating assembly, the other end of each movable contact plate is provided with a movable contact in abutting contact with a fixed contact on the fixed contact plate, the driving direction of the magnetic driving assembly is the same as the moving direction of the contact support, and the magnetic driving assembly drives the movable contact plate to move around the rotating axis of the rotating assembly so as to enable the movable contact to be in contact with or separated from the fixed contact plate.

As an implementation mode, the rotating component is provided with an elastic piece, two ends of the elastic piece are respectively propped against the head support and the movable contact plate, and when the magnetic driving component pushes the movable contact to be contacted with the static contact plate, the elastic piece generates elastic acting force for driving the movable contact to prop against the static contact plate.

As an implementation manner, the electric meter further comprises a flexible connection, one end of the flexible connection is connected with one end of the movable contact plate, the other end of the flexible connection is connected with the first wiring piece, and at least two movable contact plates are connected in series or in parallel through the flexible connection.

As an implementation mode, the contact assembly is further provided with a magnetism increasing assembly, the magnetism increasing assembly comprises a first magnetism increasing block arranged on the movable contact plate and a second magnetism increasing block arranged on one side of the static contact plate, and the first magnetism increasing block and the second magnetism increasing block interact to increase the contact force of the movable contact plate and the static contact plate.

As an implementation manner, the electric meter further comprises a shielding plate attached to the side face of the magnetic driving assembly, the shielding plate encloses the magnetic driving assembly, and an air gap is formed between at least one shielding plate and the other shielding plates.

As an implementation manner, the electric meter further comprises a circuit board arranged on one side of the composite switch and the current detector along the third direction, and the load switch and the current detector are arranged on the board surface of the circuit board.

The beneficial effects of the application include:

The application provides an ammeter, which comprises a load switch and a current detector, wherein the load switch and the current detector are arranged at intervals along a first direction, the load switch comprises a magnetic driving assembly and a contact assembly, the contact assembly comprises a static contact plate and a movable contact plate connected with the magnetic driving assembly, the magnetic driving assembly drives the movable contact plate to be contacted with or separated from the static contact plate, the load switch also comprises an arc extinguishing chamber arranged on one side of the static contact plate, and the arc extinguishing chamber and the current detector are arranged on the same side of the magnetic driving assembly, so that the arc extinguishing chamber is arranged on one side, close to the current detector, of the load switch. According to the embodiment of the application, the positions of all parts in the load switch are adjusted, the arc extinguishing chamber is arranged at one side close to the current detector, and the space between the load switch and the current detector, namely the space along the first direction in the ammeter, is fully utilized, so that the space in the ammeter occupied by the load switch is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an electricity meter according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a second embodiment of an electricity meter;

FIG. 3 is a third schematic diagram of an electric meter according to an embodiment of the present application;

FIG. 4 is a schematic diagram of an electric meter according to an embodiment of the present application;

FIG. 5 is a schematic diagram of an electric meter according to an embodiment of the present application;

FIG. 6 is a simulation of the effect of an external magnetic field provided by the present application;

FIG. 7 is a second simulation of the effect of external magnetic fields provided by the present application;

FIG. 8 is a third simulation of the effect of external magnetic fields provided by the present application;

FIG. 9 is a diagram showing a simulation of the influence of an external magnetic field according to the present application;

FIG. 10 is a schematic diagram of an electric meter according to an embodiment of the present application.

The icons are 100-ammeter, 110-load switch, 120-current detector, 130-magnetic driving component, 140-contact component, 141-movable contact plate, 142-static contact plate, 143-rotating component, 144-movable contact, 145-contact support, 150-arc extinguishing chamber, 160-wiring terminal, 170-circuit board, 180-first wiring piece, 181-manganese copper plate, 182-plug terminal, 183-soft connection, 190-magnetism increasing component, 191-first magnetism increasing block and 192-second magnetism increasing block.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application. The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application. It should be noted that, under the condition of no conflict, the features of the embodiments of the present application may be combined with each other, and the combined embodiments still fall within the protection scope of the present application.

It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

In the description of the present application, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediary, or in communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

In an aspect of the embodiment of the present application, as shown in fig. 1 and 2, there is provided an electricity meter 100, including a load switch 110 and a current detector 120, which are disposed along a first direction, the load switch 110 includes a magnetic driving assembly 130 and a contact assembly 140, the contact assembly 140 includes a stationary contact plate 142 and a movable contact plate 141 connected to the magnetic driving assembly 130, the magnetic driving assembly 130 drives the movable contact plate 141 to contact with or separate from the stationary contact plate 142, the load switch 110 further includes an arc extinguishing chamber 150 disposed on one side of the stationary contact plate 142, and the arc extinguishing chamber 150 and the current detector 120 are disposed on the same side of the magnetic driving assembly 130.

The electric meter 100 provided by the embodiment of the application is used for metering the electric quantity flowing through the electric meter 100. The ammeter 100 includes a connection terminal 160, a metering assembly, a load switch 110, and a current detector 120. The connection terminal 160 is a bridge to which commercial power and consumer electric equipment are connected, the metering assembly is used for calculating electric quantity, the load switch 110 is used for controlling on-off between the power grid and the consumer, and the current detector 120 is used for detecting leakage signals.

Specifically, in the electric meter 100 provided by the embodiment of the application, the load switch 110 and the current detector 120 are arranged along the first direction, wherein the load switch 110 includes the magnetic driving assembly 130 and the contact assembly 140, the contact assembly 140 includes the stationary contact plate 142 and the movable contact plate 141, the movable contact plate 141 is connected with the driving end of the magnetic driving assembly 130, and the magnetic driving assembly 130 is in signal connection with the circuit board 170, so as to drive the movable contact plate 141 to approach or separate from the stationary contact plate 142 to contact or separate from the stationary contact plate 142 according to the control signal of the circuit board 170, thereby realizing the opening and closing of the load switch 110. Because of the large current flowing, an arc is generated when the movable contact plate 141 is separated from the stationary contact plate 142, and the load switch 110 further includes an arc extinguishing chamber 150 disposed at one side of the stationary contact plate 142 in order to extinguish the arc. The embodiment of the present application provides the arc chute 150 and the current detector 120 on the same side of the magnetic drive assembly 130 of the load switch 110. According to the embodiment of the application, the positions of all parts in the load switch 110 are adjusted, and the arc extinguishing chamber 150 and the current detector 120 are arranged on the same side of the magnetic driving assembly 130, so that the wiring is simple and reasonable when the current of the load switch 110 passes through the current detector 120 for detection, and meanwhile, the space between the load switch 110 and the current detector 120 is fully utilized, namely, the space along the first direction in the ammeter 100 is fully utilized, so that the space in the ammeter 100 occupied by the load switch 110 is reduced.

The specific structure and detection principle of the current detector 120 are not limited in the embodiment of the present application, as long as the current flowing in the ammeter 100 can be detected. For example, the current detector 120 is a transformer, the current flowing through the static contact plate 142/the moving contact plate 141 in the load switch 110 passes through the center of the transformer, and meanwhile, the current direction is opposite to the current direction flowing through the static contact plate 142/the moving contact plate 141 by using the electrical connection between other connection terminals, so that the current is stolen and the current leakage is detected by passing through the center of the transformer through the electrical connection, and normally, the directions of the currents flowing through the two circuits passing through the center of the transformer are opposite at the same time, and the magnitudes are the same, and at the moment, the magnetic flux and the magnetic flux in the transformer are approximately zero. When the line fails, the two paths of currents are different in magnitude, and the neutralization magnetic flux of the transformer is not zero.

Specifically, the setting position of the transformer and the mode of the embodiment of the present application are not limited, and may be, for example, located on the right side of the load switch 110 as shown in fig. 1, or may be located between the second connection terminal and the third connection terminal as shown in fig. 10.

At this time, the transformer detects the current abnormality signal. The transformer is further connected to the circuit board 170, and the circuit board 170 controls the driving assembly to drive the movable contact board 141 to move away from the static contact board 142 according to the abnormal current signal, so that the load switch 110 is opened, and leakage protection of the ammeter 100 is achieved. The mutual inductor is adopted as the current detector 120, so that the structure is simple, and the detection effect is accurate.

The present application provides an electricity meter 100, comprising a load switch 110 and a current detector 120 arranged along a first direction, wherein the load switch 110 comprises an arc extinguishing chamber 150 arranged at one side of a stationary contact plate 142, and the arc extinguishing chamber 150 and the current detector 120 are arranged at the same side of a magnetic driving assembly 130, so that the arc extinguishing chamber is arranged close to the current detector 120. According to the embodiment of the application, the positions of all parts in the load switch 110 are adjusted, the arc extinguishing chamber 150 is arranged at one side close to the current detector 120, and the space between the load switch 110 and the current detector 120, namely the space along the first direction in the ammeter 100, is fully utilized, so that the space in the ammeter 100 occupied by the load switch 110 is reduced.

Alternatively, as shown in fig. 2 and 3, the driving direction of the magnetic driving assembly 130 is a second direction to drive the movable contact plate 141 to move along the second direction, and the movable contact plate 141 moves to contact with or separate from the stationary contact plate 142, and the first direction is perpendicular to the second direction.

In practical applications, the electric meter 100 is installed in an electric meter box, and an environmental magnetic field may exist outside the electric meter box, where the environmental magnetic field may cause interference to the magnetic driving component 130 of the load switch 110, so that the national standard specifies that the vertical direction corresponding to each surface of the load switch 110 should be able to withstand a certain magnetic field strength. Specifically, in order to simulate the environmental magnetic field, a magnetic source is provided on the side of the load switch 110 away from the current detector, and it is required that the load switch 110 can normally be closed or opened without changing the state under the magnetic source. The simulation calculation is performed on the presence or absence of the magnetic source and the polarity of the magnetic source, and the results are shown in fig. 6, 7, 8 and 9, wherein fig. 6 is a simulation diagram of the magnetic driving assembly when the magnetic source is not present, the holding force is 31.94N, fig. 7-9 are the holding force of the magnetic driving assembly 130 when the external magnetic source is present, the holding forces are 34.69N (side N magnetic field affected by the external magnetic source, magnetic field enhanced), 26.1N (side S magnetic field, affected by the external magnetic source, magnetic field attenuated), and 12N (moving direction N magnetic field, affected by the external magnetic source, magnetic field attenuated), and it is found that the magnetic driving assembly 130 of the load switch 110 is less affected by the external magnetic source when the driving direction of the magnetic driving assembly 130 is the second direction (i.e., when the movable iron core moves along the second direction) by performing simulation analysis on different driving directions of the magnetic driving assemblies 130. Therefore, preferably, the driving direction of the magnetic driving assembly 130 in the embodiment of the present application is the second direction, so that the external magnetic field is prevented from affecting the magnetic field of the magnetic driving assembly 130, and the working stability of the magnetic driving assembly 130 is improved. Of course, in other embodiments, the driving direction of the magnetic driving assembly 130 may be the first direction.

In addition, in order to further attenuate the influence of the external magnetic source on the magnetic drive assembly 130, the electric meter 100 further includes a shielding plate disposed outside of the magnetic drive assembly 130, the shielding plate enclosing the magnetic drive assembly 130. The shielding plate encloses the magnetic driving assembly 130 therein, so that the influence of an external magnetic field on the magnetic driving assembly 130 is weakened, meanwhile, the shielding effect is improved by directly enclosing the magnetic driving assembly 130 for shielding, the cost is reduced, the whole size of the load switch 110 is further reduced, and the load switch is convenient to install in the ammeter 100.

Further, in order to ensure that the external magnetic field does not interfere with the magnetic driving assembly 130 and simultaneously can normally drive the movable contact plate 141, no magnetic short circuit occurs, air gaps are arranged on the two shielding plates along the third direction, and the air gap on each shielding plate is larger than the movement stroke of the movable iron core in the magnetic driving assembly 130.

In one implementation manner of the embodiment of the present application, as shown in fig. 1, 2 and 3, a plurality of connection terminals 160 are disposed on one side of the load switch 110 and the current detector 120 along the second direction, the plurality of connection terminals 160 are sequentially arranged along the first direction, the plurality of connection terminals 160 are respectively electrically connected to the load switch 110, the contact assembly 140 is located between the magnetic driving assembly 130 and the connection terminals 160, and the manganese copper plate 181 is disposed on the first connection member 180.

In order to facilitate connection of the connection terminals 160, the connection terminals 160 are disposed on one side of the load switch 110 and the current detector 120 along the second direction, and the arrangement direction of the connection terminals 160 is consistent with the arrangement direction of the load switch 110 and the current detector 120, so that connection of the connection terminals 160 and the load switch 110 or the current detector 120 is facilitated. Specifically, the load switch 110 includes a housing, and the stationary contact plate 142 is disposed on an inner sidewall of the housing near one side of the connection terminal 160, such that the stationary contact plate 142 is located between the connection terminal 160 and the magnetic driving assembly 130.

When the connection terminal 160 is connected to the load switch 110, the connection terminal 160 is connected to the movable contact plate 141 and the static contact plate 142 of the load switch 110, and in order to facilitate connection of the connection terminal 160 to the movable contact plate 141 and the static contact plate 142, in the embodiment of the application, the contact assembly 140 of the load switch 110 is disposed between the magnetic driving assembly 130 and the connection terminal 160, specifically, in the embodiment, the static contact plate 142 is disposed on a side of the housing close to the connection terminal 160, and the movable contact plate 141 is far away from the static contact plate 142 or the static contact plate 142, so that the magnetic driving assembly 130 is located on a side of the contact assembly 140 far away from the connection terminal 160. The static contact plate 142 is located between the wiring terminal 160 and the magnetic driving assembly 130, so that the load switch 110 and the wiring terminal 160 are electrically connected, wiring arrangement of the electrical connection is simpler, more convenient and reasonable, and wiring resistance is further reduced.

Specifically, the connection terminal 160 includes a first connection terminal, a second connection terminal, a third connection terminal, and a fourth connection terminal that are sequentially disposed along the arrangement direction of the load switch 110 and the current detector 120, specifically, since the arc extinguishing chamber 150 and the current detector 120 are located on the same side of the magnetic driving assembly 130, and the arc extinguishing chamber 150 is disposed on one side of the stationary contact plate 142 for better arc extinguishing effect, and meanwhile, the current flowing through the load switch 110 needs to pass through the current detector 120 to be detected, so that the movable contact plate 141 is connected with the first connection terminal through the first connection member 180, the stationary contact plate 142 is connected with the second connection terminal through the second connection member, so that the electrical connection between the load switch 110 and the connection terminal is more reasonable, the resistance of the conductive loop is smaller, and the manganese copper plate 181 is disposed on the first connection member 180. The specific second connection member may be integrally designed with the static contact plate 142, for example, the static contact plate 142 directly extends outward through the current detector 120 to be connected with the second connection terminal, or two structures may be electrically connected, and the second connection member may be adjusted according to practical situations.

When the movable contact plate 141 is connected to the first connection terminal through the first connection member 180, the stationary contact plate 142 is connected to the second connection terminal through the second connection member, and when the load switch 110 is closed, a current flows along the first connection terminal, the first connection member 180, the movable contact plate 141, the stationary contact plate 142, the second connection member and the second connection terminal to form a loop, so that a flowing current is formed on the first connection member 180. The first wiring member 180 is provided with a manganese copper plate 181, as shown in fig. 4 and 5, one side of the current flowing direction at two ends of the manganese copper plate 181 is provided with a plurality of plugging terminals 182, the plugging terminals 182 are connected with the circuit board 170, the circuit board 170 detects the voltage between the two plugging terminals 182, and the current on the movable contact plate 141 can be obtained according to the voltage and the resistance calculation, so that the current on the movable contact plate 141 can be obtained.

The above description describes the use of the plug-in terminals 182 by taking the detection of the current of the movable contact 141 as an example, and in particular, the number of the plug-in terminals 182 and the implemented functions are not limited in the embodiments of the present application, and those skilled in the art may set the connection modes of the plug-in terminals 182 and the manganese copper plate 181 according to actual situations. Furthermore, a pin can be arranged on each of the movable wiring board and the static wiring board, and the pins are connected with the wiring board. After the load switch 110 is powered on, the switch-on or switch-off state of the contact can be determined by measuring the voltage difference between the two pins, and the voltage is zero, which indicates that the contact assembly 140 is closed. The voltage is not zero, indicating that the contact assembly 140 is in the open state.

The first connecting piece 180 is provided with a manganese copper plate 181, and the manganese copper plate 181 is prepared by manganese-copper alloy formed by mixing manganese and copper. The manganese-copper alloy has a smaller temperature coefficient, and the resistance change is smaller when the temperature changes, so that the stability of signals is improved.

When the current detector is a transformer, the second wiring terminal is connected with an indoor live wire, current flows into an outdoor zero line from the indoor zero line to the third wiring terminal through the transformer through the fourth wiring terminal after being loaded by a user, wherein the third wiring terminal and the fourth wiring terminal are connected through a detection line, and the detection line and part of current directions of the second wiring piece in the transformer are opposite, so that leakage detection is realized.

In one implementation manner of the embodiment of the present application, as shown in fig. 1 and 3, the first wire connecting piece 180 is located on a side of the load switch 110, which is far away from the current detector 120 and is perpendicular to a side of the ammeter, where the wire connecting piece is provided with a wire connecting terminal, the first wire connecting piece 180 is electrically connected to the first wire connecting terminal through a conductive piece, and the optional first wire connecting piece 180 may also be directly integrally formed with the conductive piece. The first wiring member 180 is disposed on a side of the load switch 110 away from the current detector 120, so that the arrangement space of the first wiring member 180 is larger, the corresponding resistance requirement can be met by the manganese copper plate 181 on the first wiring member 180, and the further first wiring member 180 is disposed on a side close to the first wiring terminal, so that wiring is facilitated.

Optionally, the movable contact plate 141 is connected to the magnetic driving assembly 130 through the contact support 145, the contact assembly 140 further includes a rotating assembly 143, the movable contact plate 141 includes at least two movable contact plates, one end of each movable contact plate 141 is connected to the rotating assembly 143, the other end is provided with a movable contact 144 in abutting contact with the static contact plate 142, and the driving direction of the magnetic driving assembly 130 is the same as the moving direction of the contact support 145, so that the overall space layout of the load switch 110 is more compact, although in other embodiments, the driving direction of the magnetic driving assembly 130 may be perpendicular to the moving direction of the contact support 145, which is not limited herein. The magnetic driving assembly 130 drives the movable contact plate 141 to move around the rotation axis of the rotation assembly 143 so as to make the movable contact plate contact with or separate from the static contact plate 142, and the movable contact plate 141 is provided with the movable contact 144 only at one end, which is beneficial to reducing the number of contacts and reducing the manufacturing cost.

The driving direction of the magnetic driving assembly 130 is the same as the moving direction of the contact support 145, the magnetic driving assembly 130 drives the contact support 145 to move along the second direction, one end of each movable contact plate 141 is connected with the rotating assembly 143, and when the contact support 145 moves, one side of the movable contact plate 141 connected with the rotating assembly 143 can rotate, so that the supporting force of one side of the movable contact plate 141 provided with the movable contact 144, which is contacted with the fixed contact plate 142, is adjustable.

Specifically, the rotating component 143 is provided with an elastic member, two ends of the elastic member respectively support against the contact support 145 and the movable contact plate 141, and when the magnetic driving component 130 pushes the movable contact 144 to contact with the static contact plate 142, the elastic member generates an elastic force for driving the movable contact 144 to support against the static contact plate 142.

The elastic member generates an elastic force to drive the movable contact plate 141 to set the movable contact 144 toward the stationary contact plate 142, so that the movable contact 144 is in close contact with the stationary contact plate 142, stability of the movable contact plate 141 in contact with the stationary contact plate 142 is improved, capability of repulsion impact and thermal shock against short-circuit current is improved, and closing stability of the load switch 110 is improved.

The elastic piece is a torsion spring. Optionally, the electric meter 100 further includes a flexible connection 183, one end of the flexible connection 183 is connected to one end of the connection between the movable contact plate 141 and the rotating assembly 143, the other end is connected to the first wiring member 180, and at least two movable contact plates 141 are connected in series or in parallel through the flexible connection 183.

As can be seen from the above description, the movable contact plate 141 is driven by the magnetic driving assembly 130 to approach or separate from the stationary contact plate 142, and in order to connect the movable contact plate 141 and the first wiring member 180, the flexible connection 183 is used to connect the movable contact plate 141 and the first wiring member 180.

The at least two movable contact plates 141 are connected in series or in parallel through the flexible connection 183, the plurality of movable contact plates 141 connected in parallel can lead current to be split, and the current at the movable contact point is reduced, so that compared with the single movable contact plate 141, the heat dissipation area of the plurality of movable contact plates 141 is increased, the heat stability of the movable contact plates 141 is improved, and the excessive temperature of the movable contact plates 141 is avoided. In addition, the parallel arrangement makes each movable contact plate 141 bear partial current, so that repulsive force between the movable contact plate 141 and the static contact plate 142 is reduced in multiple, and stable contact of the movable contact plate and the static contact plate is facilitated. The series arrangement enables the whole current loop to form a plurality of break points, compared with a single break point, the opening distance of the movable contact plate 141 is increased by times, the dielectric property is obviously improved, meanwhile, the arc is divided into a plurality of sections, the total arc voltage is increased, and the arc extinguishing effect can be obviously improved.

In one implementation manner of the embodiment of the present application, the magnetic increasing component 190 is further disposed on the contact component 140, where the magnetic increasing component 190 includes a first magnetic increasing block 191 disposed on the movable contact board 141 and a second magnetic increasing block 192 disposed on one side of the static contact board 142, where the first magnetic increasing block 191 and the second magnetic increasing block 192 interact to increase the contact force between the movable contact board 141 and the static contact board 142, when the movable contact board 141 contacts the static contact board 142, an annular magnetic field is generated by a current in the movable contact board 141, and the magnetic field forms a magnetic flux path through the first magnetic increasing block 191 and the second magnetic increasing block 192, and the magnetic flux makes the first magnetic increasing block 191 and the second magnetic increasing block 192 generate an electromagnetic force that attracts each other, in general, the larger the current is, the larger the electromagnetic force between the first magnetic increasing block and the second magnetic increasing block is, so that the capacity of the contact component 140 against a short circuit and a large current is enhanced.

When the movable contact plate 141 contacts with the static contact plate 142, the first magnetism increasing block 191 and the second magnetism increasing block 192 are attracted to each other, and since the first magnetism increasing block 191 is disposed on the movable contact plate 141 and the second magnetism increasing block 192 is disposed on one side of the static contact plate 142, the movable contact plate 141 drives the first magnetism increasing block 191 to increase the contact force between the movable contact plate 141 and the static contact plate 142 when the first magnetism increasing block 191 approaches to the second magnetism increasing block 192, and the stability of the movable contact plate 141 in contact with the static contact plate 142 is improved, thereby improving the switching-on stability of the load switch 110.

In one implementation manner of the embodiment of the present application, as shown in fig. 1, 2 and 3, the load switch 110 further includes a circuit board 170 disposed on one side of the load switch 110 and the current detector 120 along the third direction, and the load switch 110 and the current detector 120 are disposed on a board surface of the circuit board 170.

The circuit board 170 is connected to the load switch 110 and the current detector 120, respectively, to control opening or closing of the load switch 110 according to the result of the current detector 120.

The circuit board 170 is disposed at one side of the load switch 110 and the current detector 120 along the third direction, so that the connection of the circuit board 170 with the load switch 110, the first wiring member 180 and the current detector 120 can be facilitated. Since the circuit board 170 is plate-shaped and is disposed at one side of the load switch 110 and the current detector 120 along the third direction, the layout in the electricity meter 100 is more reasonable.

The above description is only of the preferred embodiments of the present application and is not intended to limit the present application, but various modifications and variations can be made to the present application by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (11)

1. The utility model provides an ammeter, its characterized in that includes load switch (110) and current detector (120) that set up along first direction, load switch (110) include magnetic drive subassembly (130) and contact subassembly (140), contact subassembly (140) include static touch board (142) and with movable touch board (141) that magnetic drive subassembly (130) are connected, magnetic drive subassembly (130) drive movable touch board (141) with static touch board (142) contact or separation, load switch (110) still include set up in explosion chamber (150) of static touch board (142) one side, just explosion chamber (150) with current detector (120) set up in the same side of magnetic drive subassembly (130).

2. The electricity meter of claim 1, wherein a driving direction of said magnetic driving assembly (130) is a second direction to drive said movable contact plate (141) in said second direction, said movable contact plate (141) moving in contact with or separated from said stationary contact plate (142), said first direction being perpendicular to said second direction.

3. The electricity meter of claim 2, wherein a plurality of connection terminals (160) are provided at one side of the load switch (110) and the current detector (120) along the second direction, the plurality of connection terminals (160) are sequentially arranged along the first direction, the plurality of connection terminals (160) are electrically connected to the load switch (110), respectively, and the contact assembly (140) is located between the magnetic driving assembly (130) and the connection terminals (160).

4. A meter as claimed in claim 3, characterized in that said terminals (160) comprise a first terminal, a second terminal, a third terminal and a fourth terminal arranged in succession along the direction of arrangement of said load switch (110) and current detector (120), said movable contact (141) being connected to the first terminal by means of a first connection (180), said stationary contact (142) being connected to the second terminal by means of a second connection, said third and fourth terminals being electrically connected by means of a conductive element and passing through said current detector (120), said first connection (180) being provided with a copper manganese plate.

5. The electricity meter of claim 4, wherein said first wire (180) is located on a side of said load switch (110) remote from said current detector (120), said first wire (180) being electrically connected to said first wire terminal (160).

6. The electricity meter according to claim 4 or 5, wherein the movable contact plates (141) are connected with the magnetic driving assembly (130) through a contact support (145), the contact assembly (140) further comprises a rotating assembly (143), the movable contact plates (141) comprise at least two movable contact plates, one end of each movable contact plate (141) is connected with the rotating assembly (143), the other end of each movable contact plate is provided with a movable contact (144) which is in abutting contact with a stationary contact on the stationary contact plate (142), the driving direction of the magnetic driving assembly (130) is the same as the moving direction of the contact support (145), and the magnetic driving assembly (130) drives the movable contact plates (141) to move around the rotating axis of the rotating assembly (143) so as to enable the movable contact (144) to be contacted with or separated from the stationary contact plate (142).

7. The electricity meter of claim 6, wherein an elastic member is disposed on the rotating assembly (143), two ends of the elastic member respectively abut against the contact support (145) and the movable contact plate (141), and when the magnetic driving assembly (130) pushes the movable contact (144) to contact with the stationary contact plate (142), the elastic member generates an elastic force for driving the movable contact (144) to abut against the stationary contact plate (142).

8. The electricity meter according to claim 7, further comprising a flexible connection (183), wherein one end of said flexible connection (183) is connected to one end of said movable contact (141), and the other end is connected to said first wiring member (180), and at least two of said movable contacts (141) are connected in series or in parallel via said flexible connection (183).

9. The electricity meter according to any one of claims 1 to 5, wherein the contact assembly (140) is further provided with a magnetism increasing assembly (190), the magnetism increasing assembly (190) comprises a first magnetism increasing block (191) disposed on the movable contact plate (141) and a second magnetism increasing block (192) disposed on one side of the stationary contact plate (142), and the first magnetism increasing block (191) interacts with the second magnetism increasing block (192) to increase the contact force between the movable contact plate (141) and the stationary contact plate (142).

10. An electricity meter according to any of claims 1 to 5, further comprising a shield plate positioned in registry with a side of said magnetic drive assembly (130), said shield plate enclosing said magnetic drive assembly (130), at least one of said shield plates forming an air gap with the other shield plate.

11. The electricity meter of claim 1, further comprising a circuit board (170) disposed on one side of said load switch (110) and said current detector (120) in a third direction, and said load switch (110) and said current detector (120) are disposed on a board surface of said circuit board (170).