Contact assembly, load switch and electricity meter

Abstract

The utility model provides a contact assembly, a load switch and an electric meter, and relates to the technical field of low-voltage electrical appliances, the contact assembly comprises a static contact plate and a movable contact plate which is driven to move along a first direction and is contacted with or separated from the static contact plate, and at least two contact points are formed on the movable contact plate. The static contact plate is in contact with or separated from the moving contact plate to form at least two breakpoints, the opening distance of at least one breakpoint is smaller than the opening distance of other breakpoints, the breakpoint with the minimum opening distance is an arc contact, the other breakpoints are main contact contacts, the arc contact and the main contact contacts are arranged in series, and when the moving contact plate is separated from the static contact plate, the arc contact and the main contact contacts are connected in series. And the arc contact is separated relative to the main contact. According to the contact assembly, the load switch and the electric meter provided by the invention, the problem that the position of an arcing point is uncertain in the prior art is solved, and the number of arc extinguish chambers is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of low-voltage electrical appliances, and in particular to a contact assembly, a load switch and an electric meter. Background Art

[0002] A load switch is an electrical control device. When the change in input quantity reaches the specified requirements, it causes a predetermined step change in the controlled quantity in the electrical output circuit. Load switches have an interactive relationship between the control system and the controlled system. They are usually used in automated control circuits. In fact, they are an "automatic switch" that uses a small current to control the operation of a large current. Therefore, they play the role of automatic adjustment, safety protection, and circuit conversion in the circuit. Since load switches have unique electrical and physical characteristics in control circuits, their high insulation resistance in the off state and low on-resistance in the on state, coupled with the advantages of high standardization, good versatility, and simplified circuits, load switches are widely used in communications, automobiles, automatic control, and household appliances.

[0003] The existing load switch usually consists of a magnetic circuit system, a contact system, a transmission mechanism and a base. When a positive pulse is passed to the magnetic circuit system of the load switch, the magnetic circuit system works, and the transmission mechanism drives the moving touch plate of the contact system to contact with the static touch plate, so that the load switch is closed; when a reverse pulse is passed to the magnetic circuit system of the load switch, the magnetic circuit system works, and the transmission mechanism drives the moving touch plate to separate from the static touch plate, so that the load switch is disconnected. When the moving touch plate and the static touch plate of the contact system of the load switch are connected by a parallel circuit, four contact points are formed at both ends of the moving touch plate, and the four contact points are distributed on both sides of the moving touch plate. When the moving touch plate moves and separates from the static touch plate, only two contact points start arcing because the moving touch plate uses a parallel circuit. Since the arc starting position is uncertain, in order to achieve arc extinguishing, four arc extinguishing chambers need to be set at the four contact points for arc extinguishing, thereby increasing the volume of the load switch and the cost. Utility Model Content

[0004] The purpose of the present application is to provide a contact assembly, a load switch and an electric meter to address the deficiencies in the above-mentioned prior art, so as to solve the problem of uncertain arc starting point position in the prior art.

[0005] To achieve the above purpose, the technical solution adopted in the embodiment of the present application is as follows:

[0006] On the one hand, an embodiment of the present application provides a contact assembly, including a stationary touch plate and a moving touch plate driven to move along a first direction to contact or separate from the stationary touch plate, at least two contact points are formed on the moving touch plate, the stationary touch plate contacts or separates from the moving touch plate to form at least two breakpoints, at least one breakpoint has an opening distance smaller than that of the other breakpoints, wherein the breakpoint with the smallest opening distance is an arc contact, and the other breakpoints are main contact contacts, the arc contact and the main contact contact are arranged in series, and when the moving touch plate is separated from the stationary touch plate, the arc contact is separated relative to the main contact contact.

[0007] As an practicable manner, the contact assembly includes at least two groups, and each group of contact assemblies are connected in series.

[0008] As an practicable manner, the side of the arc contact opening position away from the main contact contact is used to set the arc extinguishing chamber.

[0009] As an implementable manner, under the same state, the difference between the opening distance of the arc contact and the opening distance of the main contact is between 0.3-2 mm.

[0010] As an implementable manner, the arc contact and the main contact contact are respectively arranged at the two ends of the moving touch plate, and the arc contact is arranged at the first end of the moving touch plate. The contact assembly also includes a contact bracket for driving the moving touch plate to move. The moving touch plate contact is arranged on the contact bracket. At the connecting surface between the contact bracket and the moving touch plate, the contact bracket or the moving touch plate has an inclined support structure toward the first end of the moving touch plate, so that the opening distance of the first end of the moving touch plate is smaller than the opening distance of the second end of the moving touch plate.

[0011] As an implementable manner, the arc contact and the main contact contact are respectively arranged at the two ends of the moving touch plate, and the arc contact is arranged at the first end of the moving touch plate, and the moving touch plate and the stationary touch plate satisfy at least one of the following conditions so that the opening distance of the first end of the moving touch plate is smaller than the opening distance of the second end of the moving touch plate: the first end of the moving touch plate is bent toward the stationary touch plate; the first end of the stationary touch plate is bent toward the moving touch plate; the degree of bending of the first end of the moving touch plate toward the stationary touch plate is greater than the degree of bending of the second end toward the stationary touch plate; the degree of bending of the first end of the stationary touch plate toward the moving touch plate is greater than the degree of bending of the second end toward the moving touch plate.

[0012] As an implementable manner, contact pieces are provided at corresponding breakpoint positions of the moving touch plate and the stationary touch plate, so that the moving touch plate and the stationary touch plate are connected or separated through the contact pieces, and the arc contact is provided at the first end of the moving touch plate, and the thickness of the moving touch plate and / or the contact piece at the first end of the touch plate along the first direction is greater than the thickness of the contact piece at the second end, so that the opening distance of the first end of the moving touch plate is smaller than the opening distance of the second end of the moving touch plate.

[0013] As an implementable manner, an elastic member is provided between the side of the movable touch plate away from the stationary touch plate and the contact bracket, or the side of the stationary touch plate away from the movable touch plate, so that the movable touch plate maintains a trend of keeping the opening distance of the first end smaller than the opening distance of the second end.

[0014] On the other hand, an embodiment of the present application provides a load switch, including a shell, an arc extinguishing chamber arranged in the shell, a drive system and the above-mentioned contact assembly, the drive system is connected to the contact bracket of the contact assembly to drive the moving contact plate to approach or move away from the stationary contact plate through the contact bracket, and the arc extinguishing chamber is arranged at the arc contact opening position of the moving contact plate of the contact assembly.

[0015] In another aspect of the embodiments of the present application, an electric meter is provided, comprising an electric meter body and the above-mentioned load switch connected to the electric meter body.

[0016] The beneficial effects of this application include:

[0017] The present application provides a contact assembly, including a stationary contact plate and a moving contact plate driven to move along a first direction to contact or separate from the stationary contact plate, at least two contact points are formed on the moving contact plate, the stationary contact plate contacts or separates from the moving contact plate to form at least two breakpoints, at least one breakpoint has a smaller opening distance than the other breakpoints, wherein the breakpoint with the smallest opening distance is an arc contact, and the other breakpoints are main contact contacts, the arc contact and the main contact contact are arranged in series, and when the moving contact plate is separated from the stationary contact plate, the arc contact is separated relative to the main contact contact. In the process of closing the contact assembly, the arc contact contacts first; in the process of opening the contact assembly, the arc contact is separated later, so that the arc is generated at the arc contact, and the position of the arc starting point is determined. In this way, arc extinguishing can be achieved by setting an arc extinguishing chamber at the arc contact. Therefore, the contact assembly of the present application can solve the problem of uncertain position of the arc starting point in the prior art, thereby reducing the number of arc extinguishing chambers. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 One of the structural schematic diagrams of a contact assembly provided in an embodiment of the present application;

[0020] Figure 2 A second structural schematic diagram of a contact assembly provided in an embodiment of the present application;

[0021] Figure 3 A state diagram of a contact assembly provided in an embodiment of the present application;

[0022] Figure 4 A third structural schematic diagram of a contact assembly provided in an embodiment of the present application;

[0023] Figure 5 A fourth structural schematic diagram of a contact assembly provided in an embodiment of the present application;

[0024] Figure 6 A fifth structural diagram of a contact assembly provided in an embodiment of the present application;

[0025] Figure 7 A sixth structural diagram of a contact assembly provided in an embodiment of the present application;

[0026] Figure 8 This is a seventh structural schematic diagram of a contact assembly provided in an embodiment of the present application.

[0027] Icon: 100-contact assembly; 11-housing; 121-moving contact plate; 122-stationary contact plate; 13-contact bracket; 131-inclined support structure; 14-elastic member; 15-contact member; 210-arc extinguishing chamber; 220-driving system. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. It should be noted that, in the absence of conflict, the various features in the embodiments of the present application can be combined with each other, and the combined embodiments are still within the scope of protection of the present application.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0031] Furthermore, the terms “first”, “second”, “third”, etc. are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.

[0032] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] In one aspect of the embodiment of the present application, Figure 1 , Figure 2 and Figure 3 As shown, a contact assembly 100 is provided, including a stationary contact plate 122 and a contact plate 124 driven along a first direction (eg Figure 1 The movable touch plate 121 moves in the A direction in the middle to contact or separate from the static touch plate 122, at least two contact points are formed on the movable touch plate 121, the static touch plate 122 contacts or separates from the movable touch plate 121 to form at least two break points, at least one break point has a smaller opening distance than the other break points, wherein the break point with the smallest opening distance is the arc contact, and the other break points are the main contact contacts, the arc contact and the main contact contact are arranged in series, and when the movable touch plate 121 is separated from the static touch plate 122, the arc contact is separated relative to the main contact contact and serves as the arc starting point.

[0034] The contact assembly 100 of the embodiment of the present application is applied to a load switch. Specifically, the load switch includes a drive system 220, an arc extinguishing chamber 210, and a contact assembly 100. The drive system 220 is connected to a moving touch plate 121 to drive the moving touch plate 121 to contact or separate from the stationary touch plate 122. For example, the moving touch plate 121 includes two contact points, which are located at both ends of the moving touch plate 121, such as Figure 1 and Figure 2 As shown, when the moving touch plate 121 is separated from the static touch plate 122, the load switch is opened, so that the external circuit is disconnected; when the moving touch plate 121 is in contact with the static touch plate 122, the load switch is closed to connect the external circuit. When the moving touch plate 121 is separated from the static touch plate 122, the contact points at both ends of the moving touch plate 121 form breakpoints respectively. Since the moving touch plate 121 and the static touch plate 122 form multiple breakpoints when they are separated, when the static touch plate 122 is separated from the moving touch plate 121, the breakpoint separated later generates an arc as the arc starting point. In the embodiment of the present application, the opening distance of at least one breakpoint of the moving touch plate 121 is smaller than the opening distance of other breakpoints, wherein the breakpoint with the smallest opening distance is the arc contact, and the other breakpoints are the main contact contacts, that is, the opening distance at the arc contact is smaller than the opening distance of the main contact contact. When the moving touch plate 121 is separated from the static touch plate 122, the arc contact is separated later, so that the arc starting point is located at the arc contact.

[0035] More specifically, when the contact assembly 100 is opened, the moving contact plate 121 is driven to move upward, away from the stationary contact plate 122. After moving a certain distance, the main contact contacts are separated first because the main contact contacts have a large opening distance. At this time, since the arc contacts are still in contact, no arc is generated. The moving contact plate 121 continues to move upward, so that the arc contacts are separated and an arc is generated. As can be seen from the above, during the opening process of the contact assembly 100, an arc is generated at the arc contact. At this time, only the arc extinguishing chamber 210 needs to be provided at the arc contact for arc extinguishing, thereby reducing the number of arc extinguishing chambers 210.

[0036] In addition, the present application does not limit the number of stationary touch panels 122 and the specific position and structure of the external wiring row. For example, the stationary touch panels 122 include two, which can be as follows: Figure 1 As shown, the two sides of the first end of the stationary touch plate 122 are arranged; Figure 4 As shown, it is arranged on the side of the second end of the stationary touch plate 122. When the external wiring row of the stationary touch plate 122 is arranged on both sides of the first end of the stationary touch plate 122, the drive system 220 is arranged above the moving touch plate 121, and the arc extinguishing chamber 210 is arranged at the first end of the moving touch plate 121. The two moving touch plates 121 are electrically connected at the second end, so that the internal space of the housing 11 can be fully utilized.

[0037] The present application provides a contact assembly 100, including a stationary touch plate 122 and a moving touch plate 121 driven to move along a first direction to contact or separate from the stationary touch plate 122, at least two contact points are formed on the moving touch plate 121, the stationary touch plate 122 contacts or separates from the moving touch plate 121 to form at least two breakpoints, at least one breakpoint has an opening distance smaller than that of the other breakpoints, wherein the breakpoint with the smallest opening distance is an arc contact, and the other breakpoints are main contact contacts, the arc contact and the main contact contact are arranged in series, and when the moving touch plate 121 is separated from the stationary touch plate 122, the arc contact is separated relative to the main contact contact and serves as an arc starting point. During the closing process of the contact assembly 100, the arc contact contacts first; during the opening process of the contact assembly 100, the arc contact separates later, so that the arc is generated at the arc contact, and the position of the arc starting point is determined. In this way, arc extinguishing can be achieved by setting an arc extinguishing chamber 210 at the arc contact. Therefore, the contact assembly of the present application can solve the problem of uncertain arc starting point position in the prior art, thereby reducing the number of arc extinguishing chambers 210.

[0038] Optionally, the contact assembly includes at least two groups, and each group of contact assemblies are connected in series.

[0039] Specifically, the number of groups and the arrangement of the contact assembly 100 are not limited in the embodiment of the present application, and the contact assembly includes two groups, three groups or four groups. The moving touch plate 121 extends along the second direction, and multiple groups of moving touch plates 121 can be arranged along the second direction or along the third direction. For example, Figure 1 , Figure 2and Figure 8 As shown, for example, Figure 1 , Figure 2 and Figure 8 As shown, the movable contact plate 121 extends along the second direction, and the contact assembly 100 includes two groups of contact assemblies arranged along the third direction. The movable contact plates 121 of the two groups of contact assemblies are connected to each other to form a series circuit. The first direction and the second direction ( Figure 1 C direction) and the third direction ( Figure 1 Specifically, the movable touch panel 121 includes two along the third direction, and the corresponding stationary touch panel 122 includes two along the third direction, and the first end of the movable touch panel 121 is respectively provided with a contact point, and the second end of the movable touch panel 121 is respectively provided with a contact point, and the first end of the corresponding stationary touch panel 122 is respectively provided with a contact point.

[0040] like Figure 1 and Figure 2 As shown, when the moving touch plate 121 includes two, the two moving touch plates 121 are electrically connected. The two static touch plates 122 are connected to the two ends of the external circuit. When the moving touch plate 121 is separated from the static touch plate 122, the load switch is opened, so that the external circuit is disconnected; when the moving touch plate 121 is in contact with the static touch plate 122, since the moving touch plate 121 is electrically connected, the two static touch plates 122 are connected through the two moving touch plates 121, and the load switch is closed to achieve the connection of the external circuit. When the moving touch plate 121 is separated from the static touch plate 122, a breakpoint is formed at the first end of a moving touch plate 121 to form two breakpoints at the first end of the contact assembly 100, and similarly, two breakpoints are formed at the second end of the contact assembly 100, thereby forming four breakpoints. When the moving touch plate 121 contacts or separates from the stationary touch plate 122, since the contact assembly is connected by a parallel circuit, when the stationary touch plate 122 separates from the moving touch plate 121, the two breakpoints separated later generate an arc, which serves as the arc starting point. In the embodiment of the present application, the opening distance between the two breakpoints at the first end of the moving touch plate 121 is smaller than the opening distance between the two breakpoints at the second end, that is, the arc contact is set at the first end of the moving touch plate. When the moving touch plate 121 separates from the stationary touch plate 122, the arc contact is separated later, so that the two arc starting points are located at the first end of the moving touch plate 121, and the arc extinguishing chamber is set at the first end of the moving touch plate 121 to achieve arc extinguishing when the switch is opened.

[0041] The connection method of two adjacent contact assemblies is not limited in the embodiment of the present application. For example, the arc contact is arranged at the first end of the moving touch plate 121, and the arc extinguishing chamber 210 is also arranged at the first end of the moving touch plate 121. The two moving touch plates 121 are electrically connected at the second end, which can avoid the influence of the arc generated when the moving touch plate 121 and the stationary touch plate 122 are in contact or separated at the first end on the electrical connection, thereby improving the stability of the contact assembly 100.

[0042] In addition, the use of a soft connection or an elastic conductive member to connect the second ends of the two moving touch pads 121 can avoid electrical connection failure caused by the two moving touch pads 121 being out of sync during movement.

[0043] As an implementable manner, the side of the arc contact open position away from the main contact contact is used to set an arc extinguishing chamber, which can better extinguish the arc.

[0044] When the contact assembly 100 is applied to a load switch with high current and high voltage, the voltage of the arc generated when the contact assembly is opened is high, and the arc is also long, so an arc extinguishing chamber 210 needs to be set to extinguish the arc. In this case, an arc extinguishing chamber 210 is set at the arc contact. When the contact assembly 100 includes multiple parallel circuits, an arc extinguishing chamber 210 is set at the arc contact of each parallel circuit, and adjacent arc extinguishing chambers 210 are isolated by the housing 11. Specifically, Figure 1 As shown, the housing 11 extends between the two break points of the first end, isolating the two break points and the two arc extinguishing chambers 210, and preventing the arcs on the two break points from short-circuiting and causing arc extinguishing failure.

[0045] When the contact assembly 100 is applied to a load switch of low voltage and low current, the voltage of the arc generated when the contact assembly is opened is low and the arc is also short. The arc can be extinguished by forming an air outlet on the side wall of the arc extinguishing space.

[0046] Optional, such as Figure 3 As shown, under the same state, the difference between the opening distance of the arc contact and the opening distance of the main contact is between 0.3-2mm.

[0047] It can be understood that after the moving contact plate 121 approaches the stationary contact plate 122 and the moving contact plate 121 and the stationary contact plate 122 are in contact at the arc contact, the moving contact plate 121 continues to move downward along the first direction so that the main contact of the moving contact plate 121 contacts the stationary contact plate 122 to achieve the closing of the contact assembly 100. During this process, the moving contact plate 121 and the stationary contact plate 122 at the arc contact will inevitably rub against each other. Therefore, the difference between the opening distance of the moving contact plate 121 and the stationary contact plate 122 at the arc contact and the opening distance at the main contact contact cannot be too large, because the larger the difference, the more likely it is that the main contact contact will move after the arc contact contacts. The larger the moving distance, the more serious the wear on the moving touch plate 121 and the static touch plate 122 at the arc contact; in addition, the difference between the distance between the moving touch plate 121 and the static touch plate 122 at the arc contact and the distance at the main contact contact cannot be too small, because the smaller the difference, when the arc contact contacts, the main contact contact distance is too small, and an arc will be generated due to the creepage distance. In view of the above two considerations, the embodiment of the present application sets the difference between the distance between the moving touch plate 121 and the static touch plate 122 at the arc contact and the distance between the moving touch plate 121 and the static touch plate 122 at the main contact contact to between 0.3-2.0mm. The specific numerical value can be set by a person skilled in the art according to the actual situation, for example, 0.5mm, 0.8mm, 1.0mm, 1.2mm, 1.5mm, etc.

[0048] Optionally, the arc contact and the main contact contact are respectively arranged at both ends of the moving touch plate, and the arc contact is arranged at the first end of the moving touch plate. The contact assembly 100 also includes a contact bracket 13 for driving the moving touch plate 121 to move. The moving touch plate 121 is contact-arranged on the contact bracket 13. At the connecting surface between the contact bracket 13 and the moving touch plate 121, the contact bracket 13 or the moving touch plate 121 has an inclined support structure 131 toward the first end of the moving touch plate 121, so that the opening distance of the first end of the moving touch plate 121 is smaller than the opening distance of the second end of the moving touch plate 121.

[0049] For example, Figure 4 and Figure 5 As shown, the contact support 13 has an inclined support structure 131 facing the first end of the moving touch plate 121, so that the opening distance of the first end of the moving touch plate is smaller than the opening distance of the second end of the moving touch plate.

[0050] When the contact bracket 13 has an inclined support structure 131 facing the first end of the movable touch plate 121, the contact bracket 13 can lift the second end of the movable touch plate 121 and lower the first end, so that the first end of the movable touch plate 121 is closer to the stationary touch plate 122, so that the distance between the first end of the movable touch plate 121 and the corresponding stationary touch plate 122 is smaller than the distance between the second end of the movable touch plate 121 and the corresponding stationary touch plate 122.

[0051] The specific structure of the inclined support structure 131 is not limited in the present application embodiment, and is exemplified as follows: Figure 4 As shown, the supporting surface of the contact bracket 13 for the moving touch plate 121 is set as an inclined surface, so that the contact area between the contact bracket 13 and the moving touch plate 121 is larger and the contact is relatively stable; Figure 5 As shown, a protrusion is provided on the supporting surface of the contact bracket 13 for the moving touch plate 121, so that the moving touch plate 121 is lifted at the position on the protrusion to form an inclined support structure 131. The protrusion structure is relatively easy to process.

[0052] It can be understood that when the movable touch plate 121 includes multiple ones, the contact bracket 13 corresponds to the number of the movable touch plates 121, that is, when the contact assembly 100 includes two groups, the contact bracket 13 includes two, and each contact bracket 13 is connected to the center of the corresponding movable touch plate 121 along the second direction so that the first end and the second end of the movable touch plate 121 are located on both sides of the contact bracket 13.

[0053] In one achievable manner of the embodiment of the present application, the movable touch panel 121 has an inclined support structure 131 facing the first end of the movable touch panel 121, so that the opening distance of the first end of the movable touch panel is smaller than the opening distance of the second end of the movable touch panel.

[0054] When the movable touch pad 121 has an inclined support structure 131 facing the first end of the movable touch pad 121, the inclined support structure 131 can lift the second end of the movable touch pad 121 and lower the first end, so that the first end of the movable touch pad 121 is closer to the stationary touch pad 122, so that the distance between the first end of the movable touch pad 121 and the corresponding stationary touch pad 122 is smaller than the distance between the second end of the movable touch pad 121 and the corresponding stationary touch pad 122.

[0055] It can be understood that the inclined support structure 131 provided on the movable touch plate 121 can also be an inclined surface or a protrusion, which is the same as the structure of the inclined support structure 131 provided on the contact bracket 13; it can also have other forms, as long as the first end of the movable touch plate 121 can be lower than the second end of the movable touch plate 121 in the first direction.

[0056] The arc contact and the main contact are respectively arranged at both ends of the moving touch plate 121, and the arc contact is arranged at the first end of the moving touch plate. The moving touch plate 121 and the stationary touch plate 122 satisfy at least one of the following conditions so that the opening distance of the first end of the moving touch plate is smaller than the opening distance of the second end of the moving touch plate:

[0057] The first end of the movable touch plate 121 is bent toward the stationary touch plate 122;

[0058] The first end of the stationary touch plate 122 is bent toward the moving touch plate 121;

[0059] The bending degree of the first end of the movable touch plate 121 toward the stationary touch plate 122 is greater than the bending degree of the second end toward the stationary touch plate 122;

[0060] The bending degree of the first end of the stationary touch plate 122 toward the moving touch plate 121 is greater than the bending degree of the second end toward the moving touch plate 121 .

[0061] For example, Figure 6 As shown, the first end of the movable touch pad 121 is bent toward the direction close to the stationary touch pad 122; or, the degree of bending of the first end of the movable touch pad 121 toward the stationary touch pad 122 is greater than the degree of bending of the second end toward the stationary touch pad 122, so that the distance between the first end of the movable touch pad 121 and the corresponding stationary touch pad 122 is smaller than the distance between the second end of the movable touch pad 121 and the corresponding stationary touch pad 122.

[0062] When the movable touch panel 121 is a flat plate structure, the first end of the movable touch panel 121 is bent toward the direction close to the stationary touch panel 122, so that the first end of the movable touch panel 121 is closer to the stationary touch panel 122 than the second end, so that the distance between the first end of the movable touch panel 121 and the corresponding stationary touch panel 122 is smaller than the distance between the second end of the movable touch panel 121 and the corresponding stationary touch panel 122; when the movable touch panel 121 is Figure 6 When the movable touch pad 121 has a bending structure, the bending degree of the first end of the movable touch pad 121 toward the stationary touch pad 122 is greater than the bending degree of the second end toward the stationary touch pad 122, so that the distance between the first end of the movable touch pad 121 and the corresponding stationary touch pad 122 is smaller than the distance between the second end of the movable touch pad 121 and the corresponding stationary touch pad 122.

[0063] Among them, Figure 6 As shown, the bending angle of the second end of the movable touch pad 121 is smaller than the bending angle of the first end of the movable touch pad 121. The bending angle is relative to the moving direction of the movable touch pad 121, that is, the first direction.

[0064] For example, Figure 7 As shown, the first end of the stationary touch pad 122 is bent along the first direction toward the direction close to the moving touch pad 121; or, the degree to which the first end of the stationary touch pad 122 is bent toward the moving touch pad 121 is greater than the degree to which the second end is bent toward the moving touch pad 121, so that the distance between the first end of the moving touch pad 121 and the corresponding stationary touch pad 122 is smaller than the distance between the second end of the moving touch pad 121 and the corresponding stationary touch pad 122.

[0065] When the stationary touch panel 122 is a flat plate structure, the first end of the stationary touch panel 122 is bent along the first direction toward the direction close to the moving touch panel 121, so that the first end of the stationary touch panel 122 is closer to the moving touch panel 121 than the second end, so that the distance between the first end of the moving touch panel 121 and the corresponding stationary touch panel 122 is smaller than the distance between the second end of the moving touch panel 121 and the corresponding stationary touch panel 122; when the moving touch panel 121 is Figure 7When the bending structure is formed, the degree to which the first end of the stationary touch plate 122 is bent toward the moving touch plate 121 is greater than the degree to which the second end is bent toward the moving touch plate 121, so that the distance between the first end of the moving touch plate 121 and the corresponding stationary touch plate 122 is smaller than the distance between the second end of the moving touch plate 121 and the corresponding stationary touch plate 122.

[0066] Among them, Figure 7 As shown, the bending angle of the second end of the stationary touch plate 122 is greater than the bending angle of the first end of the stationary touch plate 122. The bending angle is relative to the moving direction of the moving touch plate 121, that is, the first direction.

[0067] In one possible implementation of the embodiment of the present application, Figure 4 As shown, the moving touch plate 121 and the stationary touch plate 122 are both provided with contact pieces 15 at corresponding breakpoint positions, so that the moving touch plate 121 and the stationary touch plate 122 are connected or separated through the contact pieces 15, and the arc contact is provided at the first end of the moving touch plate, and the thickness of the contact piece 15 at the first end of the moving touch plate 121 and / or the stationary touch plate 122 along the first direction is greater than the thickness of the contact piece 15 at the second end, so that the opening distance at the first end of the moving touch plate is smaller than the opening distance at the second end of the moving touch plate.

[0068] The movable touch panel 121 and the stationary touch panel 122 are provided with contact members 15 at corresponding breakpoint positions, which can improve the stability of the movable touch panel 121 and the stationary touch panel 122 when in contact. Specifically, a connector is provided on the side of the movable touch panel 121 close to the stationary touch panel 122 and on the side of the stationary touch panel 122 close to the movable touch panel 121. When the movable touch panel 121 approaches the stationary touch panel 122, the connectors on the movable touch panel 121 and the stationary touch panel 122 come into contact.

[0069] The specific structure of the contact 15 is not limited in the embodiment of the present application. For example, an anti-ablation copper-based or silver-based material can be used to improve the arc ablation resistance of the contact 15 and make it have a longer life. It should be noted that the breakpoint is the point when the moving touch plate 121 and the stationary touch plate 122 are separated or contacted, that is, each breakpoint includes the contact point of the moving touch plate 121 and the contact point of the stationary touch plate 122, and the contact 15 is set at the contact point of the moving touch plate 121 and the stationary touch plate 122.

[0070] During the opening process of the contact assembly 100, since the distance between the two contact members 15 at the first end is smaller than the distance between the two contact members 15 at the second end, the moving contact plate 121 and the stationary contact plate 122 are separated after the first end, generating an arc, so that the arc is generated at the first end.

[0071] Optional, such as Figure 4 and Figure 5As shown, an elastic member 14 is disposed between the side of the movable touch plate 121 away from the stationary touch plate 122 and the contact support 13, or the side of the stationary touch plate 122 away from the movable touch plate, so that the movable touch plate maintains a trend of keeping the opening distance of the first end smaller than the opening distance of the second end.

[0072] In order to improve the stability of the state of the moving touch plate 121 and the static touch plate 122 after closing, an elastic member 14 is arranged between the side of the moving touch plate 121 away from the static touch plate 122 and the contact bracket 13, or between the static touch plate 122 and the housing 11. The elastic member 14 has a certain thrust on the moving touch plate 121 or the static touch plate 122, so that the moving touch plate 121 and the static touch plate 122 can be reliably contacted and can withstand a certain short-circuit high current. In addition, the elastic member 14 stabilizes the state of the moving touch plate 121 or the static touch plate 122, so that during or after the opening process, the distance between one end of the moving touch plate 121 and one end of the corresponding static touch plate 122 is always smaller than the distance between the other end of the moving touch plate 121 and the corresponding static touch plate 122.

[0073] Specifically, the specific structure of the elastic member 14 is not limited in the present embodiment, and can be, for example, as follows: Figure 4 and Figure 5 The compression spring shown may also be other elastic members 14 such as a torsion spring.

[0074] The embodiment of the present application also discloses a load switch, including a housing 11, an arc extinguishing chamber 210 disposed in the housing 11, a drive system 220, and the above-mentioned contact assembly 100, wherein the drive system 220 is connected to the contact support 13 of the contact assembly 100 to drive the moving contact plate 121 to approach or move away from the stationary contact plate 122 through the contact support, and the arc extinguishing chamber 210 is disposed at the arc contact opening position of the moving contact plate 121 of the contact assembly 100. The load switch includes the same structure and beneficial effects as the contact assembly 100 in the aforementioned embodiment. The structure and beneficial effects of the contact assembly 100 have been described in detail in the aforementioned embodiment, and will not be repeated here.

[0075] The embodiment of the present application also discloses an electric meter, including an electric meter body and the above-mentioned load switch connected to the electric meter body.

[0076] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A contact assembly, characterized in that: The invention comprises a stationary touch plate (122) and a moving touch plate (121) driven to move along a first direction to contact or separate from the stationary touch plate (122), wherein at least two contact points are formed on the moving touch plate (121), and the stationary touch plate (122) contacts or separates from the moving touch plate (121) to form at least two break points, wherein the opening distance of at least one break point is smaller than the opening distances of the other break points, wherein the break point with the smallest opening distance is an arc contact, and the other break points are main contact contacts, wherein the arc contact and the main contact contact are arranged in series, and when the moving touch plate (121) is separated from the stationary touch plate (122), the arc contact is separated relative to the main contact contact.

2. The contact assembly according to claim 1, characterized in that: The contact assembly (100) comprises at least two groups, and each group of contact assemblies is connected in series.

3. The contact assembly according to claim 1 or 2, characterized in that: The side of the arc contact opening position away from the main contact contact is used to set an arc extinguishing chamber (210).

4. The contact assembly according to claim 1, characterized in that: In the same state, the difference between the opening distance of the arc contact and the opening distance of the main contact is between 0.3-2 mm.

5. The contact assembly according to claim 1, characterized in that: The arc contact and the main contact are respectively arranged at two ends of the moving touch plate (121), and the arc contact is arranged at the first end of the moving touch plate (121). The contact assembly (100) also includes a contact bracket (13) for driving the moving touch plate (121) to move. The moving touch plate (121) is contact-arranged on the contact bracket (13). At the connection surface between the contact bracket (13) and the moving touch plate (121), the contact bracket (13) or the moving touch plate (121) has an inclined support structure (131) facing the first end of the moving touch plate (121), so that the opening distance of the first end of the moving touch plate (121) is smaller than the opening distance of the second end of the moving touch plate (121).

6. The contact assembly according to claim 1, characterized in that: The arc contact and the main contact are respectively arranged at two ends of the moving touch plate (121), and the arc contact is arranged at the first end of the moving touch plate (121), and the moving touch plate (121) and the stationary touch plate (122) satisfy at least one of the following conditions so that the opening distance of the first end of the moving touch plate (121) is smaller than the opening distance of the second end of the moving touch plate (121): The first end of the movable touch plate (121) is bent in the direction of the stationary touch plate (122); The first end of the stationary touch plate (122) is bent toward the moving touch plate (121); The degree to which the first end of the movable touch plate (121) is bent toward the stationary touch plate (122) is greater than the degree to which the second end is bent toward the stationary touch plate (122); The degree to which the first end of the stationary touch plate (122) is bent toward the moving touch plate (121) is greater than the degree to which the second end is bent toward the moving touch plate (121).

7. The contact assembly according to claim 1, characterized in that: The movable touch plate (121) and the stationary touch plate (122) are both provided with contact pieces (15) at corresponding breakpoint positions, so that the movable touch plate (121) and the stationary touch plate (122) are connected or separated through the contact pieces (15); the arc contact is provided at the first end of the movable touch plate; the thickness of the contact piece (15) at the first end of the movable touch plate (121) and / or the stationary touch plate (122) along the first direction is greater than the thickness of the contact piece (15) at the second end, so that the opening distance of the first end of the movable touch plate (121) is smaller than the opening distance of the second end of the movable touch plate (121).

8. The contact assembly according to any one of claims 5 to 7, characterized in that: An elastic member (14) is provided between a side of the movable touch plate (121) away from the stationary touch plate (122) and a contact support (13), or a side of the stationary touch plate (122) away from the movable touch plate, so that the movable touch plate (121) maintains a tendency that the opening distance at the first end is smaller than the opening distance at the second end.

9. A load switch, characterized in that: The invention comprises a housing (11), an arc extinguishing chamber (210) arranged in the housing (11), a driving system (220), and a contact assembly (100) according to any one of claims 1 to 8, wherein the driving system (220) is connected to a contact support (13) of the contact assembly (100) so as to drive the moving contact plate (121) to approach or move away from a stationary contact plate (122) through the contact support (13), and the arc extinguishing chamber (210) is arranged at the arc contact opening position of the moving contact plate (121) of the contact assembly (100).

10. An electric meter, characterized in that: The utility model comprises an electric meter body and a load switch as claimed in claim 9 connected to the electric meter body.

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