Contact assembly, pole unit, change-over switch, low-voltage switch and power distribution equipment

Abstract

The invention discloses a contact assembly, a pole unit, a change-over switch, a low-voltage switch and power distribution equipment, and relates to the technical field of low-voltage electric appliances. The contact assembly provided by the invention comprises at least one moving contact group and at least one static contact group which is in contact with or separated from the moving contact group, and the moving contact group comprises at least one first active contact which is connected with the static contact group in a clamping manner and at least one first arc moving contact which is connected with the static contact group in a clapping manner. The contact assembly provided by the above design can combine the advantages of high breaking capacity of a clapping type contact and high short endurance capacity of a clamping type contact, reduces the degree of damage to the first main moving contact and the first arc moving contact caused by electric arc burning, and enables the contact assembly to be more reliable and safer in the switching-on and switching-off process.

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 pole unit, a transfer switch, a low-voltage switch and a power distribution device. Background Art

[0002] In the field of electrical technology, automatic transfer switches are used to provide uninterrupted power supply to loads and are able to switch between different power sources to ensure the continuity of power supply.

[0003] In the process of conceiving and realizing the present application, the inventors found that there are at least the following problems: in some realities, the moving contact is usually a multi-axis snap-on contact or a clamping contact, which cannot take into account the respective advantages of the snap-on contact and the clamping contact; and because the arc root cannot be avoided from moving on the static contact before entering the arc extinguishing chamber during the opening process, the movement of the arc root on the static contact will burn a part of the contact, which can easily damage the moving contact.

[0004] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Summary of the invention

[0005] The purpose of the present application is to provide a contact assembly that is not easily burned by electric arc and can retain the breaking capacity of a snap-type contact and the short-term resistance capacity of a clamping contact, so as to solve the problem that the existing moving contact cannot take into account the advantages of both the clamping contact and the snap-type contact and is easily damaged by electric arc burning.

[0006] To solve the above technical problems, the embodiments of the present application are implemented as follows:

[0007] According to one aspect of an embodiment of the present application, a contact assembly is provided, comprising at least one moving contact group and at least one stationary contact group in contact with or separated from the moving contact group, wherein the moving contact group comprises at least one first active contact clamped to the stationary contact group and at least one first arc moving contact snapped to the stationary contact group.

[0008] Optionally, the combination of the first active contact and the first arc moving contact includes at least one of the following:

[0009] At least one first arc moving contact is movably connected to at least one first active contact;

[0010] At least one first arc moving contact is fixedly connected to at least one first active contact.

[0011] Optionally, when at least one first arc moving contact is movably connected to at least one first active contact, there is at least one degree of freedom between the first arc moving contact and the first active contact.

[0012] Optionally, when the contact assembly is opened, the first active contact is first separated from the static contact group and moves a preset distance, and then the first arc moving contact is separated from the static contact group.

[0013] Optionally, the moving contact group further includes a contact support member, and a contact partition plate, a first elastic element, and a second elastic element arranged in the contact support member;

[0014] The first active contact is arranged on at least two main contact plates arranged opposite to each other, one end of the main contact plate is connected to the contact support, and the other end extends out of the contact support to be electrically connected to the static contact group;

[0015] The first arc moving contact is arranged on the arc striking contact plate, and one end of the arc striking contact plate is coaxially arranged with one end of the main contact plate close to the contact support member so as to be stacked with the main contact plate;

[0016] The arc striking contact plate and the main contact plate are stacked in a receiving cavity in the middle of the contact partition plate;

[0017] The first elastic element is respectively arranged between the main contact plate and the contact partition plate, and between the arc striking contact plate and the contact partition plate, so that the arc striking contact plate and the main contact plate are clamped with each other;

[0018] The first arc moving contact is in elastic friction contact with the first moving contact through the second elastic element, and forms a permanent electrical connection;

[0019] The first elastic element is arranged between the contact support and the first arc moving contact so as to keep the first arc moving contact under the force tendency of closing.

[0020] Optionally, the main contact plate includes at least one of the following:

[0021] A circular hole is provided at one end of the main contact plate and the arc striking contact plate close to the contact support, a fixed shaft is passed through the circular hole, and the arc striking contact plate can rotate relative to the main contact plate around the fixed shaft;

[0022] The main contact plate comprises a first clamping portion and a second clamping portion, and the first clamping portion and the second clamping portion are arranged opposite to each other on the same side of the contact supporting member.

[0023] Optionally, the contact assembly includes at least one electrical contact point, and the electrical contact point includes at least one of the following:

[0024] The stationary contact group has at least one electrical contact point which is clamp-connected to the first active contact;

[0025] The stationary contact group has at least one electrical contact point which is snap-connected with the first moving contact.

[0026] Optionally, the electrical contact points of the snap-fit ​​connection of the stationary contact group use the second material, and the electrical contact points of the clamping connection of the stationary contact group use the first material, and the second material is more resistant to burning than the first material.

[0027] Another aspect of the embodiments of the present application provides a pole unit, comprising the above-mentioned contact assembly.

[0028] In another aspect of an embodiment of the present application, a transfer switch is provided. The transfer switch includes a drive device, an operating mechanism and a contact assembly. The drive device drives the operating mechanism to drive the contact assembly to realize the closing and opening functions of the transfer switch.

[0029] In another aspect of an embodiment of the present application, a low-voltage switch is provided. The low-voltage switch includes a drive device, an operating mechanism and a contact assembly. The drive device drives the operating mechanism to drive the contact assembly to realize the closing and opening functions of the low-voltage switch.

[0030] On the other hand, an embodiment of the present application provides a power distribution equipment, which is equipped with a low-voltage switch and / or a transfer switch. The low-voltage switch and / or the transfer switch includes a drive device, an operating mechanism and a contact assembly. The drive device can drive the operating mechanism to drive the moving contact assembly to realize the closing and opening functions of the low-voltage switch and / or the transfer switch.

[0031] The beneficial effects of the embodiments of the present application include at least one of the following: the contact assembly provided by the embodiments of the present application includes at least one group of moving contact groups and at least one group of stationary contact groups that are in contact with or separated from the moving contact groups, and the moving contact groups include at least one first active contact that is clamped and connected to the stationary contact groups and at least one first arc moving contact that is snapped and connected to the stationary contact groups. Through such an arrangement, good arc extinguishing capability is achieved while achieving good electrical connection. The contact assembly provided by the above design can combine the advantages of the strong breaking capability of the snapping contact and the strong short-circuit resistance of the clamping contact, while reducing the degree of damage to the first active contact and the first arc moving contact caused by arc burning, making the contact assembly more reliable and safe during the opening and closing process.

[0032] The pole unit provided in the embodiment of the present application includes the above-mentioned contact assembly, which can combine the advantages of strong breaking capacity of the snap-type contacts and strong short-circuit withstand capacity of the clamping contacts, and has a good arc-striking effect, making the opening and closing process more reliable and safe.

[0033] The switching switch provided in the embodiment of the present application includes the above-mentioned contact assembly and operating mechanism, which can combine the advantages of strong breaking capacity of snap-type contacts and strong short-term withstand capacity of clamping contacts, and has a good arc-striking effect, which can ensure that the process is more reliable and safe when switching power.

[0034] The low-voltage switch provided in the embodiment of the present application, including the above-mentioned contact assembly and operating mechanism, can combine the advantages of strong breaking capacity of the snap-type contacts and strong short-circuit resistance of the clamping contacts, and has a good arc-striking effect, which can ensure that the process is more reliable and safe when switching the power supply.

[0035] The power distribution equipment provided in the embodiment of the present application is equipped with the above-mentioned low-voltage switch. The above-mentioned low-voltage switch should be equipped with the power distribution equipment. The power distribution equipment can be used in the whole house intelligence and should be equipped in the smart home and Internet of Things industries to realize the whole house intelligent management. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] 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.

[0037] Figure 1 A schematic diagram of the structure of a low-voltage switch provided in an embodiment of the present application;

[0038] Figure 2 A schematic diagram of the structure of a contact assembly provided in an embodiment of the present application;

[0039] Figure 3 This is an enlarged view of the details at A;

[0040] Figure 4 One of the structural schematic diagrams of the moving contact assembly provided in the embodiment of the present application;

[0041] Figure 5 The second structural schematic diagram of the moving contact assembly provided in the embodiment of the present application;

[0042] Figure 6 A schematic structural diagram of a main contact plate of a moving contact assembly provided in an embodiment of the present application.

[0043] Icons: 100 - contact assembly; 110 - moving contact group; 1101 - main contact plate; 1102 - arcing contact plate; 111 - first active contact; 112 - first arc moving contact; 1111 - first clamping part; 1112 - second clamping part; 113 - contact support; 1131 - contact partition; 1132 - first elastic element; 1133 - second elastic element; 120 - stationary contact group; 121 - main stationary contact; 122 - arcing stationary contact; 123 - stationary contact plate; 200 - low-voltage switch; 210 - arc extinguishing assembly; 220 - load end; 230 - magnetic conductive block. DETAILED DESCRIPTION

[0044] 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.

[0045] 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 which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0046] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0047] 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.

[0048] In some realities, the contacts of automatic transfer switches are usually set to be snap-on contacts or clamp-on contacts, which cannot take into account the respective advantages of snap-on contacts and clamp-on contacts; and because the arc root cannot be avoided from moving on the static contact before entering the arc extinguishing chamber during the opening process, the movement of the arc root on the static contact will burn part of the contacts, resulting in a weak arc extinguishing ability of the automatic transfer switch.

[0049] Driven by intelligent and automated high-tech, the smart home industry has entered a period of rapid development. The smart home industry is facing new challenges and opportunities in the transformation of technology, market and industry.

[0050] According to the function, the smart home can be divided into eight modules: entertainment system, security system, control system, lighting system, kitchen and bathroom appliance system, network and communication system, health care system, and indoor environment system. The eight modules work together to realize the whole house intelligence.

[0051] In view of this, in order to solve the above problems, one aspect of an embodiment of the present application provides a contact assembly 100, including at least one group of moving contact groups 110 and at least one group of stationary contact groups 120 in contact with or separated from the moving contact groups 110, the moving contact groups 110 including at least one first active contact 111 clamped with the stationary contact groups 120 and at least one first arc moving contact 112 snap-connected with the stationary contact groups 120.

[0052] Specifically, the present application provides a contact assembly 100, including at least one static contact group 120 and at least one movable contact group 110 in contact with or separated from the static contact group 120. The movable contact group 110 includes at least one first active contact 111 and at least one first arc movable contact 112; the first active contact 111 is connected to the static contact group 120 by clamping; the first arc movable contact 112 is connected to the static contact group 120 by snapping.

[0053] Through such a setting, a good arc extinguishing capability is achieved while achieving a good electrical connection. The moving contact group 110 provided by the above design can combine the advantages of the strong breaking capability of the snap-on contact and the strong short-circuit resistance capability of the clamping contact, while ensuring that the moving contact group 110 is not damaged by arc burning, making the opening and closing process of the moving contact group 110 more reliable and safe.

[0054] like Figure 2 As shown, in one embodiment of the present application, a moving contact group 110 is provided. The moving contact group 110 includes a group of moving contact groups 110. The moving contact group 110 includes a contact support member 113, and the contact support member 113 can rotate in a clockwise direction or a counterclockwise direction;

[0055] The contact support 113 is fixedly connected to two oppositely arranged main contact plates 1101, and the first active contact 111 is arranged on the plate surface of the main contact plate 1101. Figure 4 and Figure 5 As shown, the first active contact 111 is composed of a first clamping portion 1111 and a second clamping portion 1112 which are located on the same side of the contact support 113 and are arranged opposite to each other, wherein the first clamping portion 1111 and the second clamping portion 1112 are arranged on the same side of the main contact plate 1101 to clamp the side of the plate surface of the static contact group 120; when the contact support 113 rotates, it can drive the main contact plate 1101 to rotate, so that the first active contact 111 changes its position to close or open the circuit with the static contact group 120.

[0056] The static contact group 120 includes a static contact plate 123, which is fixed relative to the contact support 113, and a main static contact 121 capable of being clamped and connected with the first active contact 111 is arranged on the plate surface of the static contact plate 123;

[0057] The moving contact group 110 also includes two oppositely arranged arc-striking contact plates 1102 rotatably connected to the contact support 113. The arc-striking contact plates 1102 are stacked with the main contact plate 1101, and a first elastic element 1132, such as a torsion spring or a compression spring, is arranged between the two plates, so that the arc-striking contact plate 1102 can have a tendency to maintain a closing force relative to the main contact plate 1101; a first arc moving contact 112 is arranged on the side edge of the arc-striking contact plate 1102, and when the contact support 113 rotates, it can drive the arc-striking contact plate 1102 to rotate, so that the first arc moving contact 112 changes its position to close or open the circuit with the static contact group 120.

[0058] The stationary contact group 120 further includes an arcing stationary contact 122 which is also disposed on the stationary contact plate 123 . The arcing stationary contact 122 is disposed on a side edge of the stationary contact plate 123 close to the first arcing moving contact 112 .

[0059] When the moving contact group 110 is closed, the contact support 113 rotates in the counterclockwise direction or the clockwise direction, which can drive the main contact plate 1101 and the arc-striking contact plate 1102 to rotate together. Since the first arc moving contact 112 on the arc-striking contact plate 1102 is arranged at the edge, it can first be snapped and connected with the arc static contact 122 on the static contact plate 123, and no longer continue to rotate with the contact support 113; the contact support 113 drives the main contact plate 1101 to continue to rotate in the direction of movement until the first active contact 111 on the plate surface of the main contact plate 1101 clamps the main static contact 121 on the static contact plate 123, so as to realize the closing of the moving contact group 110.

[0060] When the moving contact group 110 is opened, the contact support 113 rotates in the counterclockwise direction or the clockwise direction, and can drive the main contact plate 1101 to rotate so that the first active contact 111 is separated from the main static contact 121 located on the static contact plate 123. At this time, the first arc moving contact 112 located on the arc striking contact plate 1102 still maintains the snap connection with the arc static contact 122 located on the static contact plate 123. The contact support 113 continues to drive the main contact plate 1101 to move a certain displacement until the main contact plate 1101 is overlapped with the arc striking contact plate 1102 again. At this time, the torsion spring or the compression spring is reset, and the arc striking contact plate 1102 follows the contact support 113 to rotate so that the first arc moving contact 112 is separated from the static contact group 120, so as to realize the opening of the moving contact group 110.

[0061] In a preferred embodiment of the present application, a first protrusion may be provided on the side of the arc-striking touch plate 1102 close to the stationary contact plate 123, and the first protrusion may be provided as an arc-shaped structure; correspondingly, a second protrusion is provided on the side of the stationary contact plate 123 close to the arc-striking touch plate 1102, and the second protrusion may be provided as an arc-shaped structure to match the first protrusion.

[0062] When the contact support 113 rotates in the counterclockwise direction or the clockwise direction, it can drive the main contact plate 1101 and the arc-striking contact plate 1102 to rotate together. Since the first arc moving contact 112 on the arc-striking contact plate 1102 is arranged at the edge, it can first be connected with the arc static contact 122 on the static contact plate 123, and no longer follow the contact support 113 to continue to rotate. At this time, the first protrusion is in contact with the second protrusion, and the edges of the two arc-shaped structures are tangent. The contact support 113 drives the main contact plate 1101 to continue to rotate in the direction of movement until the first active contact 111 on the plate surface of the main contact plate 1101 clamps the main static contact 121 on the static contact plate 123. In this process, the first protrusion of the arc contact plate rotates along the second protrusion to separate the first arc moving contact 112 from the static contact group 120.

[0063] When the contact support 113 rotates counterclockwise or clockwise to drive the main contact plate 1101 to rotate so that the first active contact 111 is separated from the main static contact 121 located on the static contact plate 123, during this process, the first protrusion of the arc-striking contact plate 1102 rotates along the second protrusion so that the first arc moving contact 112 is again connected with the static contact group 120. The contact support 113 continues to drive the main contact plate 1101 to move a certain displacement until the main contact plate 1101 is again stacked with the arc-striking contact plate 1102, at which time the torsion spring or the compression spring is reset, and the arc-striking contact plate 1102 follows the contact support 113 to rotate so that the first arc moving contact 112 is separated from the static contact group 120, so as to realize the opening of the moving contact group 110.

[0064] The above-mentioned embodiment of the moving contact group 110 combines the advantages of the strong breaking capacity of the snap-type contact and the strong short-circuit resistance capacity of the clamping contact, and can realize the process of first connecting and then separating the first arc moving contact 112, thereby ensuring that the moving contact group 110 is not damaged by arc burning, making the opening and closing process of the moving contact group 110 more reliable and safe.

[0065] Furthermore, the combination of the first active contact 111 and the first arc moving contact 112 includes at least one of the following:

[0066] At least one first arc moving contact 112 is movably connected to at least one first active contact 111;

[0067] Specifically, in addition to the above-mentioned specific embodiments of the moving contact group 110, the first active contact 111 and the first arc moving contact 112 can also be combined as follows: at least one first arc moving contact 112 is movably connected to at least one first active contact 111, so that the first arc moving contact 112 can rotate along with the rotation of the first active contact 111, and can also rotate relative to the first active contact 111.

[0068] In a preferred embodiment of the present application, Figure 3 As shown, the first active contact 111 and the first arc moving contact 112 are respectively arranged on the main contact plate 1101 and the arc striking contact plate 1102, and the first active contact 111 and the first arc moving contact 112 are both arranged at the edges of the main contact plate 1101 and the arc striking contact plate 1102, and are both arranged on the side of the main contact plate 1101 and the arc striking contact plate 1102 close to the static contact group 120; the main contact plate 1101 and the arc striking contact plate 1102 are stacked and can be mutually The first active contact 111 can rotate or translate relative to the first arc-moving contact 112 and translate. When the first active contact 111 moves toward the stationary contact group 120, the first active contact 111 can move a certain displacement together with the first arc-moving contact 112. After the first arc-moving contact 112 is snap-connected with the stationary contact group 120, the first active contact 111 can still move a certain displacement along this direction until it is clamped and connected with the stationary contact group 120.

[0069] A contact partition 1131 is provided in the contact support 113 of the moving contact group 110, and the contact partition 1131 is used to support and constrain the main contact plate 1101 and the arc-striking contact plate 1102; the main contact plate 1101 and the arc-striking contact plate 1102 are stacked in sequence and placed in the accommodating cavity of the contact partition 1131. Among them, a circular hole is opened at one end of the main contact plate 1101 and the arc-striking contact plate 1102 close to the contact support 113, and a fixed shaft is passed through the circular hole, and the arc-striking contact plate 1102 can rotate relative to the main contact plate 1101 around the fixed shaft.

[0070] A first elastic element 1132 is further provided in the contact support 113 of the moving contact group 110. The first elastic element 1132 is respectively provided between the main contact plate 1101 and the contact partition 1131, and between the arc-striking contact plate 1102 and the contact partition 1131, so that at least the arc-striking contact plate 1102 and the main contact plate 1101 are mutually clamped.

[0071] The first elastic element 1132 is disposed between the contact support 113 and the first arcing contact 112 to keep the first arcing contact 112 under force of closing; the first arcing contact 112 and the first moving contact are in elastic friction contact through the second elastic element 1133 and form a permanent electrical connection.

[0072] In one embodiment of the present application, at least one first arc moving contact 112 is fixedly connected to at least one first active contact 111 .

[0073] Specifically, in addition to the above-mentioned combination, the first active contact 111 and the first arc-moving contact 112 can also be combined as follows: at least one first arc-moving contact 112 can also be fixedly connected to at least one first active contact 111, so that the first active contact 111 can drive the first arc-moving contact 112 to move, so that the first arc-moving contact 112 can be clasped with the static contact group 120, and the first active contact 111 is then clamped with the static contact group 120.

[0074] In a possible implementation of the present application, when at least one first arcing contact 112 is movably connected to at least one first active contact 111 , there is at least one degree of freedom between the first arcing contact 112 and the first active contact 111 .

[0075] Specifically, Figure 4 or Figure 5 As shown, one end of the main contact plate 1101 where the first active contact 111 is located is rotatably connected to one end of the arc-striking contact plate 1102 where the first arc-moving contact 112 is located through a torsion spring or a compression spring, so that the arc-striking contact plate 1102 can rotate relative to the main contact plate 1101. When the first arc-moving contact 112 moves toward the stationary contact group 120, it can be snap-connected with the arc-stationary contact 122 and drive the main contact plate 1101 to rotate or translate in the vertical direction and / or horizontal direction relative to the arc-striking contact plate 1102. At this time, there is at least one degree of freedom between the first arc-moving contact 112 and the first active contact 111.

[0076] In one possible implementation of the present application, the combination of the moving contact group 110 and the stationary contact group 120 includes at least one of the following:

[0077] The moving contact group 110 includes at least one pair of oppositely disposed main contact plates 1101, and the stationary contact group 120 includes at least one stationary contact plate 123. The at least one pair of oppositely disposed main contact plates 1101 is electrically connected to the at least one stationary contact plate 123 in a clamping manner.

[0078] Specifically, the moving contact group 110 and the stationary contact group 120 are connected by clamping, wherein the combination of the moving contact group 110 and the stationary contact group 120 is specifically as follows:

[0079] The moving contact group 110 includes at least one pair of main contact plates 1101 arranged opposite to each other. Figure 2 , Figure 4 and Figure 5As shown, in a preferred embodiment of the present application, a pair of main contact plates 1101 are included, and the main contact plates 1101 are relatively arranged on both sides of the contact support 113, and can rotate in a clockwise direction or counterclockwise direction following the contact support 113. The stationary contact group 120 includes at least one stationary contact plate 123. In a preferred embodiment of the present application, the stationary contact plate 123 can be provided as one, and the rotation of the contact support 113 can drive the pair of main contact plates 1101 to rotate and be clamped and connected with the stationary contact plate 123.

[0080] The moving contact group 110 includes at least one main contact plate 1101 , and the stationary contact group 120 includes at least one stationary contact plate 123 disposed opposite to each other. The at least one stationary contact plate 123 disposed opposite to each other is electrically connected to the at least one main contact plate 1101 in a clamping manner.

[0081] Specifically, in addition to the above-mentioned combination, the moving contact group 110 may also include at least one main contact plate 1101. In a preferred embodiment of the present application, the moving contact group 110 may be configured as a main contact plate 1101, which is fixedly connected to the contact support 113 and extends outward, and can rotate along the clockwise or counterclockwise direction with the contact support 113; the stationary contact group 120 includes at least one pair of stationary contact plates 123 arranged opposite to each other. In a preferred embodiment of the present application, the stationary contact group 120 may be configured as a pair of stationary contact plates 123 arranged opposite to each other, and the stationary contact plates 123 may be arranged on the same side of the contact support 113 and arranged opposite to each other, such as Figure 1 and Figure 2 As shown; of course, the static contact plates 123 can also be respectively arranged on different sides of the contact support 113 and arranged oppositely, and the present application does not impose any restrictions on the specific arrangement position. The rotation of the contact support 113 can drive a main contact plate 1101 to rotate and clamp and connect with the two static contact plates 123 respectively.

[0082] In one possible implementation mode of the present application, when the moving contact set 110 is opened, the first active contact 111 is first separated from the static contact set 120 and moves a preset distance, and then the first arc moving contact 112 is separated from the static contact set 120 .

[0083] by Figure 2For example, when the moving contact group 110 is opened, the main contact plate 1101 first rotates counterclockwise to separate the first active contact 111 from the static contact group 120, and the arc-striking contact plate 1102 is still connected with the static contact group 120; when the main contact plate 1101 rotates counterclockwise to a preset position, the arc-striking contact plate 1102 is driven to separate from the static contact group 120, so that the first active contact 111 is first separated from the static contact group 120 when opening, and the first arc moving contact 112 is then separated from the static contact group 120. Through such a setting, it can be ensured that the arc-striking effect is good during the opening process, so that the main contact is not burned by the arc. Similarly, when the moving contact group 110 is closed, the first arc moving contact 112 is first connected with the static contact group 120, and the static contact group 120 is then connected with the first active contact 111.

[0084] In a preferred embodiment of the present application, the stationary contact group 120 has at least one pair of electrical contact points that are clamp-connected to the first active contact 111 ; the stationary contact group 120 has at least one pair of electrical contact points that are snap-connected to the first arc moving contact 112 .

[0085] The second material is used for the snap-fit ​​electrical contact points, and the first material is used for the clamp-type contact points. The second material is more resistant to burning than the first material. Preferably, the main contact plate 1101 is made of pure copper; the arc-striking contact plate 1102 can be made of one or more of silver-tungsten alloy, copper-tungsten alloy, and iron-based materials. Silver-tungsten alloy, copper-tungsten alloy, and iron-based materials are more resistant to burning, which can reduce the degree of burning and damage of the arc-striking contact plate 1102 during the arc-striking process, thereby improving the reliability and stability of the moving contact group 110.

[0086] It should be noted that the main contact plate 1101 includes a first clamping portion 1111 and a second clamping portion 1112, and the first clamping portion 1111 and the second clamping portion 1112 are relatively arranged on the same side of the contact support 113. The first clamping portion 1111 and the second clamping portion 1112 work together to clamp one side of the main static contact 121 of the static contact group 120. The first clamping portion 1111 and the second clamping portion 1112 can be provided with silver points to increase the connection reliability and improve the connection and disconnection capacity. Of course, the silver points can also be omitted and a static busbar can be used. Figure 6 shown.

[0087] On the other hand, an embodiment of the present application provides a pole unit, which includes the above-mentioned contact assembly 100, which can combine the advantages of the strong breaking capacity of the snap-on contact and the strong short-circuit resistance of the clamping contact, and has a good arc-striking effect, making the opening and closing process more reliable and safe; the pole unit can be provided with a magnetic block 230, and the magnetic block 230 is arranged on the movement trajectory of the moving contact group 110 to absorb the magnetic field when the moving contact group 110 and the stationary contact group 120 are opened and / or closed, so as to prevent the contact from being disconnected due to excessive current when the moving contact group 110 and the stationary contact group 120 are opened and / or closed when the current is too large, thereby improving the stability of the connection.

[0088] In another aspect of an embodiment of the present application, a transfer switch is provided. The transfer switch includes a drive device, an operating mechanism and a movable contact group 110. The drive device drives the operating mechanism to drive the contact group 110 to realize the closing and opening functions of the transfer switch.

[0089] Another aspect of the present application provides a low-voltage switch 200, which includes the above-mentioned drive device, operating mechanism and moving contact group 110. The drive device drives the operating mechanism to drive the contact group 110 to realize the closing and opening functions of the low-voltage switch 200. Figure 1 As shown, the low-voltage switch 200 further includes an arc extinguishing assembly 210 disposed at the connection between the moving contact group 110 and the static contact group 120. When the moving contact group 110 is opened or closed, the first arc moving contact 112 and the arc static contact 122 can lead the arc to the arc extinguishing chamber for arc extinguishing, thereby improving the safety of the low-voltage switch 200. The low-voltage switch 200 further includes a load terminal 220, one side of which is electrically connected to the contact support 113 of the moving contact group 110 through a soft braided belt to achieve circuit conduction with the load.

[0090] Through the setting of the operating mechanism and the pole unit, the connection, disconnection and switching of the power supply can be realized; at the same time, the low-voltage switch 200 can combine the advantages of strong breaking capacity of the snap-type contacts and strong short-term withstand capacity of the clamping contacts, and has a good arc-striking effect, which can ensure that the process of switching the power supply is more reliable and safe.

[0091] The embodiment of the present application also provides a power distribution device, which is equipped with the aforementioned low-voltage switch 200, and the power distribution device can be equipped with at least one of the following: a distribution box, a cable, a distribution cabinet, a motor, a switch socket, a lamp, an air conditioner, an electric water heater, an electric meter, a camera, a telephone, a computer, etc. Such power distribution equipment can be equipped with the circuit breaker related structure of the present application to realize intelligent management, but is not limited to the above intelligently managed power distribution equipment, and can also be equipped in non-intelligent power distribution equipment in traditional industries.

[0092] The embodiment of the present application also provides a power distribution equipment, and the aforementioned circuit breaker should be equipped with the power distribution equipment. The power distribution equipment can be used in whole-house intelligence and should be equipped in smart home and Internet of Things industries to realize whole-house intelligent management.

[0093] Optionally, the embodiments of the present application can be used for: fire-fighting electricity: fire control room, fire pumps, smoke exhaust facilities, fire elevators and their drainage pumps, fire emergency lighting, etc. at level one; corridor lighting, duty lighting, guard lighting, obstacle sign lights; rail transit; security system power supply; electronic information room power supply; passenger elevator power; sewage pump; variable frequency speed regulation constant pressure water supply and domestic pump (otherwise a secondary load); main offices, conference rooms, general duty room, archives room.

[0094] It is understood that the above scenarios are only examples and do not constitute a limitation on the application scenarios of the technical solutions provided in the embodiments of the present application. The technical solutions of the present application can also be applied to other scenarios. For example, it is known to those skilled in the art that with the evolution of the system architecture and the emergence of new business scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0095] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0096] The steps in the method of the embodiment of the present application can be adjusted in order, combined and deleted according to actual needs.

[0097] The units in the device of the embodiment of the present application can be merged, divided and deleted according to actual needs.

[0098] In the present application, the same or similar terminology concepts, technical solutions and / or application scenario descriptions are generally described in detail only the first time they appear. When they appear again later, they are generally not repeated for the sake of brevity. When understanding the technical solutions and other contents of the present application, for the same or similar terminology concepts, technical solutions and / or application scenario descriptions that are not described in detail later, reference can be made to the previous related detailed descriptions.

[0099] In the present application, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0100] The various technical features of the technical solution of the present application can be arbitrarily combined. In order to make the description concise, not all possible combinations of the various technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of the present application.

Claims

1. A contact assembly, characterized in that: The invention comprises at least one group of moving contact groups (110) and at least one group of stationary contact groups (120) in contact with or separated from the moving contact groups (110); the moving contact groups (110) comprise at least one first active contact (111) connected to the stationary contact groups (120) in a clamping manner and at least one first arc moving contact (112) connected to the stationary contact groups (120) in a snapping manner.

2. The contact assembly according to claim 1, characterized in that: The combination of the first active contact (111) and the first arc moving contact (112) comprises at least one of the following: The at least one first arc moving contact (112) is movably connected to the at least one first active contact (111); The at least one first arc moving contact (112) is fixedly connected to the at least one first active contact (111).

3. The contact assembly according to claim 2, characterized in that: When the at least one first arc moving contact (112) is movably connected to the at least one first active contact (111), at least one degree of freedom exists between the first arc moving contact (112) and the first active contact (111).

4. The contact assembly according to claim 1, characterized in that: When the contact assembly (100) is opened, the first active contact (111) is first separated from the stationary contact group (120) and moves a preset distance, and then the first arc-moving contact (112) is separated from the stationary contact group (120).

5. The contact assembly according to claim 1, characterized in that: The moving contact group (110) further comprises a contact support (113) and a contact partition (1131), a first elastic element (1132) and a second elastic element (1133) arranged in the contact support (113). The moving contact group (110) comprises at least one of the following: The first active contact (111) is arranged on at least two main contact plates (1101) arranged opposite to each other, one end of the main contact plate (1101) is connected to the contact support (113), and the other end extends out of the contact support (113) to be electrically connected to the static contact group (120); The first arc moving contact (112) is arranged on the arc striking contact plate (1102), and one end of the arc striking contact plate (1102) is coaxially arranged with one end of the main contact plate (1101) close to the contact support member (113), so as to be stacked with the main contact plate (1101); The arc-striking contact plate (1102) and the main contact plate (1101) are stacked and arranged in a receiving cavity in the middle of the contact partition plate (1131); The first elastic element (1132) is respectively arranged between the main contact plate (1101) and the contact partition plate (1131), and between the arc-striking contact plate (1102) and the contact partition plate (1131), so that the arc-striking contact plate (1102) and the main contact plate (1101) are clamped with each other; The first arc moving contact (112) and the first active contact (111) are in elastic friction contact via the second elastic element (1133), and a permanent electrical connection is formed; The first elastic element (1132) is arranged between the contact support (113) and the first arc-moving contact (112) so as to enable the first arc-moving contact (112) to maintain a force tendency of closing.

6. The contact assembly according to claim 5, characterized in that: The main contact plate (1101) comprises at least one of the following: A circular hole is provided at one end of the main contact plate (1101) and the arc striking contact plate (1102) close to the contact support (113), a fixed shaft is passed through the circular hole, and the arc striking contact plate (1102) can rotate relative to the main contact plate (1101) around the fixed shaft; The main contact plate (1101) comprises a first clamping portion (1111) and a second clamping portion (1112), wherein the first clamping portion (1111) and the second clamping portion (1112) are arranged opposite to each other on the same side of the contact support (113).

7. The contact assembly according to claim 6, characterized in that: The contact assembly (100) comprises at least one electrical contact point, wherein the electrical contact point comprises at least one of the following: The first clamping portion (1111) and / or the second clamping portion (1112) of the main contact plate (1101) is provided with a first silver electrical contact point and / or a second silver electrical contact point; The stationary contact group (120) comprises at least one electrical contact point which is clamp-connected to the first active contact (111); The stationary contact group (120) comprises at least one electrical contact point which is snap-connected with the first arc moving contact (112).

8. The contact assembly according to claim 7, characterized in that: The electrical contact points of the snap-fit ​​connection of the stationary contact group (120) use the second material, and the electrical contact points of the clamping connection of the stationary contact group (120) use the first material, and the second material is more resistant to burning than the first material.

9. A pole unit, characterized in that: The contact assembly (100) comprises any one of claims 1 to 8.

10. A transfer switch, characterized in that: The transfer switch comprises a driving device, an operating mechanism and a contact assembly (100) according to any one of claims 1 to 8, wherein the driving device drives the operating mechanism to drive the contact assembly (100) to realize the closing and opening functions of the transfer switch.

11. A low voltage switch, characterized in that: The low-voltage switch comprises a driving device, an operating mechanism and a contact assembly (100) according to any one of claims 1 to 8, wherein the driving device drives the operating mechanism to drive the contact assembly (100) to realize the closing and opening functions of the low-voltage switch.

12. A power distribution device, characterized in that: The power distribution equipment is equipped with a low-voltage switch and / or a transfer switch, and the low-voltage switch and / or the transfer switch comprises a driving device, an operating mechanism and a contact assembly (100) as described in any one of claims 1 to 8, and the driving device can drive the operating mechanism to drive the contact assembly to realize the closing and opening functions of the low-voltage switch and / or the transfer switch.

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