Contact assembly, low-voltage switch and power distribution equipment

Abstract

The invention discloses a contact assembly, a low-voltage switch and power distribution equipment, and relates to the field of electric appliance switches. The contact assembly has a closed state and an open state, the contact assembly comprises a moving contact and a static contact, and the contact assembly comprises at least one of the following parts: the moving contact is provided with a first conduction part and a first separation part, the first conduction part is in contact with the static contact in the closed state, and the first separation part is in contact with the static contact in the process of switching from the closed state to the open state. The first separation part replaces the first conduction part to be separated from the static contact after being contacted with the static contact; the static contact is provided with a second conduction part and a second separation part, in the closed state, the second conduction part is in contact with the moving contact, and in the process of switching from the closed state to the open state, the second separation part replaces the second conduction part to be in contact with the moving contact and then is separated from the moving contact. According to the contact assembly provided by the invention, good contact of the moving contact and the static contact in a closed state can be ensured, and adverse effects are reduced.

Description

Technical Field

[0001] The present application relates to the field of electrical switches, and in particular to a contact assembly, a low-voltage switch and a power distribution device. Background Art

[0002] The contact assembly configured inside the low-voltage switch or transfer switch on the market can switch between closed and open states. In the closed state, the moving contact and the static contact are in contact, thereby connecting the load end and the power end; in the open state, the moving contact and the static contact are separated, thereby disconnecting the load end and the power end.

[0003] In the process of conceiving and implementing this application, the inventors found that there are at least the following problems: in some implementations of the contact assembly, the part where the moving contact or the static contact contacts the other party in the closed state and the part where it separates from the other party when switched to the open state are both at the same position. When the moving contact and the static contact are separated, a liquid bridge or an arc will be generated, which will damage the position where the contact is separated, thereby causing poor contact between the moving contact and the static contact in the closed state, resulting in adverse effects such as increased resistance, increased temperature, and poor breaking capacity.

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

[0005] In response to the above technical problems, the present application provides a contact assembly, which can ensure that the moving contact and the static contact are in good contact in a closed state and reduce adverse effects.

[0006] Another object of the present application is to provide a low-voltage switch having a higher safety feature.

[0007] Another object of the present application is to provide a power distribution device with higher safety.

[0008] In order to solve the above technical problems, the technical solutions adopted in the embodiments of the present application are as follows:

[0009] A contact assembly has a closed state and an open state, the contact assembly comprises a moving contact and a stationary contact, and the contact assembly comprises at least one of the following:

[0010] The movable contact has a first conducting portion and a first disengaging portion. In the closed state, the first conducting portion contacts the stationary contact. In the process of switching from the closed state to the open state, the first disengaging portion replaces the first conducting portion and contacts the stationary contact and then separates.

[0011] The stationary contact has a second conducting portion and a second disengaging portion. In the closed state, the second conducting portion contacts the moving contact. In the process of switching from the closed state to the open state, the second disengaging portion replaces the second conducting portion and contacts the moving contact and then separates.

[0012] In an optional embodiment, the moving contact has the first conducting portion and the first disengaging portion, and the stationary contact has the second conducting portion and the second disengaging portion; in the closed state, the second conducting portion is in contact with the first conducting portion; when switching to the open state, the second disengaging portion is disengaged from the first disengaging portion.

[0013] In an optional embodiment, the moving contact is rotatably arranged in the contact assembly, and the rotation radius of the first conductive part is different from the rotation radius of the first disengagement part; the projection of the second conductive part in the rotation plane of the moving contact is on the rotation path of the first conductive part, and the projection of the second disengagement part in the rotation plane of the moving contact is on the rotation path of the first disengagement part.

[0014] In an optional embodiment, projections of lines connecting the second conducting portion and the second disengaging portion and the rotation center of the moving contact in the rotation plane of the moving contact form an angle.

[0015] In an optional embodiment, the first conducting portion and the first disengaging portion are located on the same side of the moving contact parallel to its rotation plane, and a limiting protrusion is convexly provided on the first disengaging portion;

[0016] The stationary contact is provided with an avoidance gap on the rotation path of the first disengaging portion; in the closed state, the limiting protrusion is in the avoidance gap; when switching to the disconnected state, the limiting protrusion is out of contact with the second disengaging portion.

[0017] In an optional implementation, the contact assembly further includes an arc extinguishing chamber, and compared with the second conducting portion, the arc extinguishing chamber is closer to the second disengaging portion.

[0018] In an optional embodiment, the number of the static contacts is multiple, including a first static contact and a second static contact, the first static contact is used to connect to a common power supply terminal, and the second static contact is used to connect to a backup power supply terminal, and in the closed state, the second conductive portion of one of the first static contact and the second static contact is in contact with the moving contact.

[0019] In an optional embodiment, the plurality of stationary contacts further include a third stationary contact and a fourth stationary contact, and the third stationary contact and the fourth stationary contact are both used to connect to the load end, and in the closed state, the second conductive portion of one of the third stationary contact and the fourth stationary contact contacts with the moving contact.

[0020] In an optional embodiment, the moving contact has a first end and a second end, and the first end and the second end both have the first conductive portion and the first disengagement portion. In the closed state, the first conductive portion on the first end contacts the second conductive portion of one of the first stationary contact and the second stationary contact, and the first conductive portion on the second end contacts the second conductive portion of one of the third stationary contact and the fourth stationary contact.

[0021] An embodiment of the present application further provides a low-voltage switch, which includes the aforementioned contact assembly.

[0022] An embodiment of the present application further provides a power distribution device, which includes the aforementioned low-voltage switch.

[0023] The contact assembly provided by the present application has a contact position of the moving contact and the stationary contact in the closed state that is different from the separation position of the two when disconnected, thereby avoiding damage to the contact surface of the moving contact and the stationary contact by liquid bridge, electric arc, etc. generated during disconnection, and preventing the moving contact and the stationary contact from having poor contact in the closed state. Therefore, the beneficial effects of the contact assembly provided by the present application include: being able to ensure good contact between the moving contact and the stationary contact in the closed state, and reducing adverse effects.

[0024] The power distribution equipment is equipped with the above-mentioned contact assembly and / or low-voltage switch. The above-mentioned contact assembly and / or low-voltage switch is applied to the power distribution equipment. The power distribution equipment can be used in a variety of usage scenarios, applied to whole-house intelligence, various intelligent scenarios and the Internet of Things industry to achieve intelligent management.

[0025] The power distribution equipment is equipped with the above-mentioned low-voltage switch. The above-mentioned low-voltage switch is applied to the power distribution equipment. The power distribution equipment can be used in a variety of usage scenarios, such as smart home, Internet of Things industry and more intelligent scenarios to achieve intelligent management. Specifically, it can be used for: Fire-fighting electricity: fire control room, fire pump, smoke exhaust facilities, fire elevators and their drainage pumps, fire emergency lighting, etc. Level 1; 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 life pump (otherwise it is a secondary load); main office, conference room, general duty room, archive room. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only illustrate certain embodiments of the present application and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the structure of the contact assembly in a closed state provided in an embodiment of the present application;

[0028] Figure 2 A schematic diagram of the structure of the contact assembly in the disconnected state provided in the embodiment of the present application;

[0029] Figure 3 It is a structural diagram of the moving contact.

[0030] Icon: 100-contact assembly; 110-moving contact; 111-first conducting part; 112-first disengaging part; 113-limiting protrusion; 114-first end; 115-second end; 120-stationary contact; 121-second conducting part; 122-second disengaging part; 123-avoidance gap; 120a-first stationary contact; 120b-second stationary contact; 120c-third stationary contact; 120d-fourth stationary contact; 130-arc extinguishing chamber; 140-normal power supply terminal; 150-standby power supply terminal; 160-load terminal. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme 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 of 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.

[0032] 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.

[0033] 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.

[0034] In the description of the present application, it should be understood that the terms "upper", "lower", "inside", "outside", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0035] Furthermore, the terms “first”, “second”, etc. are merely used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0036] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms such as "setting" and "connection" should be understood in a broad sense. For example, "connection" 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 an indirect connection through an intermediate medium, or it can be the internal connection 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.

[0037] 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.

[0038] 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.

[0039] In this digital age, people are becoming more and more dependent on electricity. Whether it is in the home, industry or commercial field, a stable and reliable power supply is essential. Among them, circuit breakers and low-voltage switches are the two most widely used switches. As a protective device in the power system, circuit breakers can be used to protect various equipment in the power system from being damaged by overload and short circuit. They are widely used in power systems, industrial production and household activities; while low-voltage switches can automatically switch to another backup power supply when one power supply fails, thereby achieving uninterrupted power supply and ensuring the normal operation of equipment. Therefore, they are often used in important power distribution occasions.

[0040] The specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings.

[0041] Example

[0042] Please refer to Figure 1 and Figure 2 , Figure 1 FIG. 1 is a schematic structural diagram of the contact assembly 100 provided in this embodiment in a closed state. Figure 2 FIG. 1 is a schematic structural diagram of the contact assembly 100 in a disconnected state.

[0043] The contact assembly 100 provided in this embodiment has a closed state and an open state. The contact assembly 100 includes a moving contact 110 and a stationary contact 120 . The moving contact 110 has a first conducting portion 111 and a first disengaging portion 112 , and the stationary contact 120 has a second conducting portion 121 and a second disengaging portion 122 .

[0044] In the closed state, the first conducting portion 111 of the movable contact 110 is in contact with the second conducting portion 121 of the stationary contact 120 to be in conduction. In the process of switching from the closed state to the open state, the movable contact 110 and the stationary contact 120 are switched from the state where the first conducting portion 111 is in contact with the second conducting portion 121 to the state where the first disengaging portion 112 is in contact with the second disengaging portion 122, and then switched to the state where the first disengaging portion 112 is out of contact with the second disengaging portion 122.

[0045] In other words, the contact assembly 100 provided in this embodiment uses the contact state of the first conducting portion 111 of the moving contact 110 and the second conducting portion 121 of the stationary contact 120 as the closed state, and the conduction between the moving contact 110 and the stationary contact 120 is achieved through the contact between the first conducting portion 111 and the second conducting portion 121. At the moment before switching to the disconnected state, the first disengaging portion 112 of the moving contact 110 contacts the second disengaging portion 122, and the conduction between the moving contact 110 and the stationary contact 120 is achieved through the contact between the first disengaging portion 112 and the second disengaging portion 122.

[0046] In actual application, at the moment when the contact assembly 100 switches to the disconnected state, the first detachment part 112 and the second detachment part 122 are separated, and the liquid bridge or arc generated by the separation will not affect the surface conditions of the first conductive part 111 and the second conductive part 121, and at most will cause damage to the first detachment part 112 and the second detachment part 122.

[0047] Therefore, when the contact assembly 100 switches to the closed state again, the first conductive portion 111 and the second conductive portion 121 are in normal contact, and the contact effect is not affected, thereby avoiding adverse effects such as increased resistance, increased temperature, and reduced breaking capacity due to poor contact.

[0048] It should be noted that, in order to avoid poor contact between the moving contact 110 and the stationary contact 120 in the closed state as much as possible, the moving contact 110 of the contact assembly 100 provided in this embodiment has a first conducting portion 111 and a first disengaging portion 112, and the stationary contact 120 has a second conducting portion 121 and a second disengaging portion 122. In other embodiments, according to actual application conditions, the contact assembly 100 may have only the moving contact 110 having the first conducting portion 111 and the first disengaging portion 112, or only the stationary contact 120 having the second conducting portion 121 and the second disengaging portion 122.

[0049] For example, in an embodiment in which only the moving contact 110 has the first conducting portion 111 and the first disengaging portion 112, in the closed state, the first conducting portion 111 contacts the stationary contact 120; in the process of switching from the closed state to the open state, the first disengaging portion 112 replaces the first conducting portion 111 and contacts the stationary contact 120 and then separates.

[0050] In an embodiment where only the static contact 120 has the second conductive portion 121 and the second disengagement portion 122, in the closed state, the second conductive portion 121 contacts the moving contact 110; in the process of switching from the closed state to the open state, the second disengagement portion 122 replaces the second conductive portion 121 to contact the moving contact 110 and then separates.

[0051] In this embodiment, the moving contact 110 is rotatably arranged in the contact assembly 100, and the rotation radius of the first conducting portion 111 is different from the rotation radius of the first disengaging portion 112; the second conducting portion 121 is on the rotation path of the first conducting portion 111, and the second disengaging portion 122 is on the rotation path of the first disengaging portion 112.

[0052] In other words, in this embodiment, within the rotation plane of the moving contact 110, the distance between the first conducting portion 111 and the rotation center is different from the distance between the first detaching portion 112 and the rotation center. Specifically, the distance between the first detaching portion 112 and the rotation center is greater than the distance between the first conducting portion 111 and the rotation center, that is, the rotation radius of the first detaching portion 112 is greater than the rotation radius of the first conducting portion 111.

[0053] It can be understood that the contact assembly 100 further includes a driving mechanism, and the moving contact 110 is connected to the driving mechanism and is used to rotate under the drive of the driving mechanism to achieve switching between a closed state and an open state.

[0054] In the rotation plane of the moving contact 110, the second conducting portion 121 and the second disengaging portion 122 each form an angle with the line connecting the rotation center of the moving contact 110. In other words, when the moving contact 110 and the stationary contact 120 switch from the state where the first conducting portion 111 contacts the second conducting portion 121 to the state where the first disengaging portion 112 contacts the second disengaging portion 122, the driving mechanism needs to drive the moving contact 110 to rotate a certain angle, so as to ensure that before the first disengaging portion 112 and the second disengaging portion 122 are disengaged, the first conducting portion 111 and the second conducting portion 121 have completed the dislocation separation.

[0055] It is understandable that, in the process of switching the contact assembly 100 from the closed state to the open state, in order to avoid the generation of a liquid bridge or an arc when the first conducting portion 111 and the second conducting portion 121 are disconnected, it is necessary to ensure that the first disengaging portion 112 and the second disengaging portion 122 are already in contact before the first conducting portion 111 and the second conducting portion 121 are disconnected. It is ensured that when the first conducting portion 111 and the second conducting portion 121 are separated, the moving contact 110 and the stationary contact 120 are in a conducting state.

[0056] Please refer to Figure 3 , Figure 3 FIG. 1 is a schematic structural diagram of the moving contact 110 .

[0057] In this embodiment, the first conducting portion 111 and the first disengaging portion 112 are located on the same side of the moving contact 110 parallel to its rotation plane, and a limiting protrusion 113 is provided on the first disengaging portion 112. The stationary contact 120 is provided with an avoidance notch 123 located on the rotation path of the first disengaging portion 112; in the closed state, the limiting protrusion 113 is located in the avoidance notch 123; when switched to the open state, the limiting protrusion 113 is out of contact with the second disengaging portion 122.

[0058] Optionally, the second conducting portion 121 and the second disengaging portion 122 are located on the same side of the stationary contact 120 parallel to the rotation plane of the moving contact 110, and this side on the stationary contact 120 is opposite to the side on the moving contact 110 where the first conducting portion 111 and the first disengaging portion 112 are located in a direction perpendicular to the rotation plane of the moving contact 110.

[0059] Therefore, the second conductive part 121 is on the rotation path of the first conductive part 111, which means that the vertical projection of the second conductive part 121 in the rotation plane of the moving contact 110 is on the rotation path of the first conductive part 111. Similarly, the second disengagement part 122 is on the rotation path of the first disengagement part 112, and the vertical projection of the second disengagement part 122 in the rotation plane of the moving contact 110 is on the rotation path of the first disengagement part 112.

[0060] In the closed state, the first conductive portion 111 and the second conductive portion 121 are in contact with each other, and the limiting protrusion 113 is in the avoidance gap 123 and protrudes from the first conductive portion 111. Therefore, the first conductive portion 111 is stopped to a certain extent by the periphery of the avoidance gap 123, that is, the closed state is locked to a certain extent through the cooperation between the limiting protrusion 113 and the avoidance gap 123.

[0061] During the process of switching the contact assembly 100 from a closed state to an open state, the moving contact 110 rotates, driving the limiting protrusion 113 to gradually rotate out of the avoidance notch 123 and gradually approach the second disengagement portion 122. During this process, in order to ensure that the limiting protrusion 113 smoothly rotates out of the avoidance notch 123 and ensures that it contacts the second disengagement portion 122 before the first conductive portion 111 is separated from the second conductive portion 121, a guide notch can be provided on the side of the avoidance notch 123 close to the second disengagement portion 122, or the top peripheral edge of the limiting protrusion 113 can be chamfered.

[0062] As the moving contact 110 continues to rotate, the first conductive part 111 separates from the second conductive part 121, and the limiting protrusion 113 abuts against the surface of the second disengagement part 122 and slides along the surface of the second disengagement part 122. When the limiting protrusion 113 slides to disengage from the side of the second disengagement part 122 away from the second conductive part 121 in the rotation direction of the moving contact 110, a liquid bridge and an arc may be generated, while the surface structures of the first conductive part 111 and the second conductive part 121 are not affected.

[0063] The contact assembly 100 provided in this embodiment further includes an arc extinguishing chamber 130, which is closer to the second detaching portion 122 than the second conducting portion 121. Optionally, the arc extinguishing chamber 130 is arranged on a side of the second detaching portion 122 away from the second contacting portion in the rotation direction of the moving contact 110. In practical applications, when the limiting protrusion 113 is separated from the second detaching portion 122, the generated arc can be effectively absorbed by the arc extinguishing chamber 130.

[0064] Optionally, the contact assembly 100 provided in this embodiment may be a dual power conversion switch, which has a plurality of static contacts 120, including a first static contact 120a and a second static contact 120b. The first static contact 120a is used to connect to a normal power supply terminal 140, and the second static contact 120b is used to connect to a backup power supply terminal 150. In a closed state, the second conductive portion 121 of one of the first static contact 120a and the second static contact 120b is in contact with the moving contact 110.

[0065] It can be understood that under normal conditions, the moving contact 110 contacts the second conducting portion 121 of the first stationary contact 120a, thereby connecting the common power supply terminal 140 to the load terminal 160, and realizing the common power supply to the load. When an abnormality occurs at the common power supply terminal 140, such as a power failure, the driving mechanism drives the moving contact 110 to rotate to contact the second conducting portion 121 of the second stationary contact 120b, thereby connecting the backup power supply terminal 150 to the load terminal 160, and realizing the backup power supply to continue to supply power to the load.

[0066] In this embodiment, the plurality of stationary contacts 120 also include a third stationary contact 120c and a fourth stationary contact 120d. The third stationary contact 120c and the fourth stationary contact 120d are both used to connect to the load end 160. In the closed state, the second conductive portion 121 of one of the third stationary contact 120c and the fourth stationary contact 120d contacts the moving contact 110.

[0067] Optionally, in this embodiment, within the rotation plane of the moving contact 110, with the rotation center of the moving contact 110 as the center of symmetry, the first static contact 120a and the fourth static contact 120d are symmetrically distributed, the second static contact 120b and the third static contact 120c are symmetrically distributed, and with a diameter of the rotation trajectory of the moving contact 110 as the boundary, the first static contact 120a and the second static contact 120b are on one side of the boundary, and the third static contact 120c and the fourth static contact 120d are on the other side of the boundary.

[0068] When the load terminal 160 is connected to the normal power supply terminal 140, the second conductive parts 121 of the first static contact 120a and the fourth static contact 120d are in contact with the moving contact 110; when the load terminal 160 is connected to the standby power supply terminal 150, the second conductive parts 121 of the second static contact 120b and the third static contact 120c are in contact with the moving contact 110.

[0069] Optionally, in this embodiment, the movable contact 110 is in an elongated shape, and has a first end 114 and a second end 115 opposite to each other, and both the first end 114 and the second end 115 have a first conducting portion 111 and a first disengaging portion 112. In a closed state, the first conducting portion 111 on the first end 114 contacts the second conducting portion 121 of one of the first stationary contact 120a and the second stationary contact 120b, and the first conducting portion 111 on the second end 115 contacts the second conducting portion 121 of one of the third stationary contact 120c and the fourth stationary contact 120d.

[0070] Optionally, the first end 114 of the moving contact 110 rotates between the first static contact 120a and the third static contact 120c, and the second end 115 thereof rotates between the second static contact 120b and the fourth static contact 120d. When the load end 160 is connected to the normal power supply end 140, the second conductive portion 121 of the first static contact 120a contacts the first conductive portion 111 on the first end 114, and the second conductive portion 121 of the fourth static contact 120d contacts the first conductive portion 111 on the second end 115; when the load end 160 is connected to the standby power supply end 150, the second conductive portion 121 of the second static contact 120b contacts the first conductive portion 111 on the second end 115.

[0071] In summary, the contact assembly 100 provided in this embodiment can ensure that the moving contact 110 and the stationary contact 120 are in good contact in a closed state, thereby reducing adverse effects.

[0072] In addition, this embodiment further provides a low-voltage switch, which includes a contact assembly 100 and a drive device, wherein the drive device is connected to the contact assembly 100. Optionally, the low-voltage switch is preferably a dual-power conversion switch. When the low-voltage switch is a dual-power conversion switch, it has better compatibility with the contact assembly 100 disclosed in this application.

[0073] Benefiting from the beneficial effects of the contact assembly 100 , the low-voltage switch provided in this embodiment has the characteristic of higher safety.

[0074] The embodiment of the present application also provides a power distribution device, which is equipped with the aforementioned low-voltage switch, 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 use the relevant structure of the low-voltage switch of the present application to realize intelligent management, but is not limited to the above intelligently managed power distribution equipment, and can also be used in non-intelligent power distribution equipment in traditional industries.

[0075] An embodiment of the present application also provides a power distribution device, in which the aforementioned low-voltage switch is applied to the power distribution device. The power distribution device can be used in smart scenarios, such as smart homes, the Internet of Things industry, and more smart scenarios, to achieve intelligent management.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] The units in the device of the embodiment of the present application can be merged, divided and deleted according to actual needs.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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 having a closed state and an open state, the contact assembly (100) comprising a moving contact (110) and a stationary contact (120), characterized in that: The contact assembly (100) comprises at least one of the following: The moving contact (110) has a first conducting portion (111) and a first detaching portion (112); in the closed state, the first conducting portion (111) contacts the stationary contact (120); in the process of switching from the closed state to the open state, the first detaching portion (112) replaces the first conducting portion (111) and contacts the stationary contact (120) and then separates; The stationary contact (120) has a second conducting portion (121) and a second disengaging portion (122). In the closed state, the second conducting portion (121) contacts the moving contact (110). In the process of switching from the closed state to the open state, the second disengaging portion (122) replaces the second conducting portion (121) and contacts the moving contact (110) and then separates.

2. The contact assembly according to claim 1, characterized in that: The moving contact (110) has the first conducting part (111) and the first disengaging part (112), and the stationary contact (120) has the second conducting part (121) and the second disengaging part (122); in the closed state, the second conducting part (121) is in contact with the first conducting part (111); when switching to the open state, the second disengaging part (122) is disengaged from the first disengaging part (112).

3. The contact assembly according to claim 2, characterized in that: The moving contact (110) is rotatably arranged in the contact assembly (100); the rotation radius of the first conducting part (111) is different from the rotation radius of the first detaching part (112); the projection of the second conducting part (121) in the rotation plane of the moving contact (110) is on the rotation path of the first conducting part (111), and the projection of the second detaching part (122) in the rotation plane of the moving contact (110) is on the rotation path of the first detaching part (112).

4. The contact assembly according to claim 3, characterized in that: The projections of the lines connecting the second conducting portion (121) and the second disengaging portion (122) and the rotation center of the moving contact (110) in the rotation plane of the moving contact (110) form an angle.

5. The contact assembly according to claim 3, characterized in that: The first conducting portion (111) and the first detaching portion (112) are located on the same side of the moving contact (110) parallel to its rotation plane, and a limiting protrusion (113) is convexly provided on the first detaching portion (112); The stationary contact (120) is provided with an avoidance notch (123) located on the rotation path of the first disengaging portion (112); in the closed state, the limiting protrusion (113) is located in the avoidance notch (123); when switched to the disconnected state, the limiting protrusion (113) is disengaged from the second disengaging portion (122).

6. The contact assembly according to claim 1, characterized in that: The contact assembly (100) further comprises an arc extinguishing chamber (130), wherein the arc extinguishing chamber (130) is closer to the second disengaging portion (122) than to the second conducting portion (121).

7. The contact assembly according to claim 1, characterized in that: The number of the static contacts (120) is multiple, and the multiple static contacts (120) include a first static contact (120a) and a second static contact (120b), the first static contact (120a) is used to connect to a common power supply terminal (140), and the second static contact (120b) is used to connect to a standby power supply terminal (150), and in the closed state, the second conducting portion (121) of one of the first static contact (120a) and the second static contact (120b) is in contact with the moving contact (110).

8. The contact assembly according to claim 7, characterized in that: The plurality of stationary contacts (120) further include a third stationary contact (120c) and a fourth stationary contact (120d), and the third stationary contact (120c) and the fourth stationary contact (120d) are both used to connect to a load end (160), and in the closed state, the second conducting portion (121) of one of the third stationary contact (120c) and the fourth stationary contact (120d) is in contact with the moving contact (110).

9. The contact assembly according to claim 8, characterized in that: The moving contact (110) has a first end (114) and a second end (115), and the first end (114) and the second end (115) both have the first conducting portion (111) and the first disengaging portion (112). In the closed state, the first conducting portion (111) on the first end (114) contacts the second conducting portion (121) of one of the first stationary contact (120a) and the second stationary contact (120b), and the first conducting portion (111) on the second end (115) contacts the second conducting portion (121) of one of the third stationary contact (120c) and the fourth stationary contact (120d).

10. A low voltage switch, characterized in that: The low-voltage switch comprises the contact assembly (100) according to any one of claims 1 to 9.

11. A power distribution device, characterized in that: The power distribution equipment comprises the low voltage switch according to claim 10.

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