WO2024002368A1

WO2024002368A1 - Moving contact structure, switch unit, isolation switch, and power supply system

Info

Publication number: WO2024002368A1
Application number: PCT/CN2023/105242
Authority: WO
Inventors: 陆佳俊; 钟允攀; 晏国云; 彭委建; 于贻鹏; 龚祚勇; 王龙江; 李强; 巴黎
Original assignee: 上海良信电器股份有限公司
Priority date: 2022-06-30
Filing date: 2023-06-30
Publication date: 2024-01-04

Abstract

A moving contact structure (100), a switch unit (200), an isolation switch (300), and a power supply system, relating to the technical field of electric appliances. The moving contact structure (100) comprises a support section (110) and connection sections (120) arranged at two opposite ends of the support section (110), the connection sections (120) being configured to be connected to or disconnected from a stationary contact (230); the width of the side of each connection section (120) cut in by the stationary contact (230) is less than the width of the side of said connection section (120) facing away from the side cut in by the stationary contact (230); an arc striking inclined surface (122) is formed on the side surface of each connection section (120) facing away from the support section (110). An arc can be allowed to quickly enter an arc extinguishing chamber (240), and the degree of burning at an on-off position of the moving contact (131) is reduced.

Description

A moving contact structure, switch unit, isolation switch and power supply system

Cross-references to related applications

This disclosure requires a Chinese patent application with application number 202210770737.6 and titled "A Switch Unit and a Rotary Switch" submitted to the State Intellectual Property Office of China on June 30, 2022. It was submitted to the State Intellectual Property Office of China on July 21, 2022. The application number of the Office is 202210869484.8, the Chinese patent application titled "A moving contact structure, switch unit, isolating switch and power supply system" and the application number submitted to the State Intellectual Property Office of China on May 23, 2023 is 202321258485.5, The priority of a Chinese patent application titled "A Moving Contact Structure and Isolating Switch", the entire content of which is incorporated into this disclosure by reference.

Technical field

The present disclosure relates to the field of electrical appliance technology, and specifically to a moving contact structure, a switch unit, an isolation switch and a power supply system.

Background technique

Rotary isolation switches are usually stacked by several switch units. Each switch unit includes a shell. Each shell is equipped with corresponding moving contacts and static contacts, as well as a turret for installing the moving contacts. When the turret rotates, the movable contact and the static contact are in different states of contact, conduction or separation and disconnection, so as to control the on and off of the access line. When the movable contact and the static contact are separated, an arc will be generated. The arc will not only cause great damage to the contacts, but also prolong the time for disconnecting the circuit, causing hidden dangers to the use of the isolating switch, so it often occurs in the Each switch unit is equipped with an arc extinguishing chamber to quickly extinguish the arc by drawing and cutting the arc.

In order to avoid interference with the arc extinguishing chamber when the existing movable contact rotates, a certain distance is usually set between the on-off position of the movable contact and the static contact and the arc extinguishing chamber, so that the movable contact cannot be used during use. The arc generated at the on-off position of the head enters the arc extinguishing chamber in time, causing severe burning at the on-off position of the moving contact, affecting the stability during use and the service life of the moving contact.

Contents of the invention

The purpose of this disclosure is to provide a moving contact structure, a switch unit, an isolating switch and a power supply system, which can enable the arc to quickly enter the arc extinguishing chamber and reduce the burning degree at the on-off position of the moving contact.

Embodiments of the present disclosure are implemented in the following manner.

One aspect of the embodiment of the present disclosure provides a movable contact structure, which may include a support section and connection sections provided at opposite ends of the support section, and the connection sections are used to connect or disconnect with the stationary contact; The width of the side of the connecting section cut by the fixed contact is smaller than the width of the side of the connecting section facing away from the fixed contact; an arc-starting slope is formed on a side of the connecting section facing away from the support section.

Optionally, the arc-starting bevel may extend continuously outward from the side where the stationary contact is cut. Optionally, the connection section may include a first contact piece and a second contact piece that are oppositely arranged, and a space for inserting the static contact is formed between the first contact piece and the second contact piece. Space, the arc ignition slope may be located on the first contact piece and the second contact piece respectively. Optionally, the support section can be arranged in a straight line, and the angle between the plane where the arc-starting slope is located and the extension direction of the support section can be 100° to 140°. Optionally, the lead-out position of the arc-starting bevel may be provided with an arc-starting fillet, and the lead-out position is located at the angle formed by the arc-starting bevel and the side of the connecting section away from the side that cuts into the static contact. Location.

Optionally, the arc-starting bevel may be located on the first contact piece and the second contact piece respectively, and the access position of the arc-starting bevel may be provided with an arc-generating fillet, and the access position is located at The arc-starting bevel and the connecting section cut into the angle formed by one side of the static contact. Optionally, the first contact piece and the second contact piece can be arranged in parallel or at a preset angle; the side of the first contact piece and the second contact piece that cuts into the static contact can be Flanges are provided respectively, and the two flanges are folded toward opposite sides. Optionally, the arc-starting fillet protrudes from the arc-starting bevel.

Optionally, the first contact piece and the second contact piece may be provided with bending portions respectively, so that the first contact piece forms a first connecting plate and a first arc starting plate that are connected to each other, so that The second contact piece is formed with a second connecting plate and a second arc starting plate that are connected to each other; the first connecting plate is parallel to the second connecting plate, and the first arc starting plate is parallel to the second arc starting plate. Board fit. Optionally, the first contact piece and the second contact piece may be provided with bending portions respectively, so that the first contact piece forms a first connecting plate and a first arc starting plate that are connected to each other, so that The second contact piece is formed with a second connecting plate and a second arc starting plate that are connected to each other; the first connecting plate and the second connecting plate can be parallel, and the first arc starting plate and the second arc starting plate can be parallel to each other. The arc plates may be parallel or have a preset angle, and the distance between the first connecting plate and the second connecting plate may be greater than the distance between the first arc starting plate and the second arc starting plate. .

Optionally, the first contact piece may be provided with a bending portion, so that the first contact piece is formed with a first connecting plate and a first arc starting plate that are connected to each other, and the second contact piece only includes a The second connecting plate corresponding to the first connecting plate; the first connecting plate and the first arc starting plate can be parallel to the second connecting plate respectively, and the first arc starting plate is located on the third connecting plate. between the plane where one connecting plate is located and the plane where the second connecting plate is located. Optionally, the movable contact structure may be integrally formed, or the movable contact structure may include a first body and a second body arranged oppositely, and the first body and the second body are connected to form the the support section and the connecting section.

Optionally, the movable contact structure may further include: a first movable contact bracket and a second movable contact bracket that are locked with each other, and are sequentially clamped and fixed on the first movable contact bracket and the third movable contact bracket. The first spring piece, the first movable contact, the second movable contact and the second spring piece between the two movable contact brackets, the third An accommodation space is formed between a movable contact and the second movable contact, and the accommodation space is used to accommodate a stationary contact. The first spring piece and the second spring piece are in the first movable contact. Under the clamping action of the contact bracket and the second movable contact bracket, the first movable contact and the second movable contact are respectively exerted a mutually approaching pressure.

Optionally, the first movable contact bracket may be provided with a hook, the second movable contact bracket may be provided with a clamping hole for the hook to extend into, and the inner wall of the clamping hole is provided with a clamping hook. The hook can hook the clamping platform so that the first movable contact bracket and the second movable contact bracket are locked. Optionally, the first movable contact bracket is provided with a first through groove, the second movable contact bracket is provided with a second through groove corresponding to the position of the first through groove, and the first through groove is provided with a second through groove corresponding to the position of the first through groove. The through groove and the second through groove are used to accommodate the first spring piece, the first movable contact, the second movable contact and the second spring piece.

Optionally, the first spring piece includes a first support section and a first pressing section provided on the first support section, and the first support section resists the first movable contact bracket, so The end of the first pressing section extends toward the first movable contact and resists the first movable contact; the second spring piece includes a second support section and a second support section provided on the second support section. a second spring section, the second support section resists the second movable contact bracket, and the end of the second spring section extends toward the second movable contact and abuts against the second movable contact hold. Optionally, the first pressing section resists the area on the first movable contact that cuts into the static contact, and the second pressing section and the second movable contact cuts into the static contact. The area of the head resists.

Optionally, a contact boss is provided on the surfaces of the first movable contact and/or the second movable contact that are close to each other, and the first movable contact and the second movable contact pass through the The contact bosses resist each other to form the accommodation space. Optionally, a first limiting boss is provided on a surface of the first movable contact facing the first spring piece, and a first limiting boss is provided on the first spring piece to cooperate with the first limiting boss. Limiting hole, the first limiting boss is used to prevent the first spring leaf from rotating, and the first spring leaf can slide along the first limiting boss to approach or move away from the first spring. piece;

The surface of the second movable contact facing the second spring piece is provided with a second limiting boss, and the second spring piece is provided with a second limiting hole that cooperates with the second limiting boss, The second limiting boss is used to prevent the second spring leaf from rotating, and the second spring leaf can slide along the second limiting boss to approach or move away from the second spring leaf. Optionally, the lead-out position of the arc-starting bevel is provided with an arc-starting fillet, and the lead-out position is located at the angle formed by the arc-starting bevel and the side of the connecting section that is away from the stationary contact. .

Another aspect of the embodiment of the present disclosure provides a switch unit, which may include a housing, and a rotating bracket provided in the housing, and the rotating bracket is provided with any one of the movable contact structures described above. ; The housing is also provided with a static contact corresponding to the movable contact structure, and an arc extinguishing component corresponding to the static contact.

Another aspect of the embodiments of the present disclosure provides a switch unit, wherein the switch unit may include a housing and a static contact assembly as a static contact structure disposed in the housing and connected to the static contact. The movable contact assembly is matched with the head structure. The movable contact assembly includes the movable contact structure described in any of the previous embodiments and is provided with lugs. The housing is provided with a container for accommodating the movable contact assembly. The inner wall of the accommodation cavity is provided with a friction boss, the movable contact assembly and the static contact structure are opened, and the boss and the friction boss are pressed against each other to make the The lug stays in the open position.

Optionally, the lug rotates following the movable contact assembly to divide an arc-shaped space in the housing, the arc-shaped space has an arc breaking position and an opening position, and the friction boss is located on the The opening position of the arc-shaped space extends toward the arc-breaking position. Optionally, the surface of the friction boss facing the lug is inclined, and an end of the inclined surface close to the arc-breaking position is lower than an end of the inclined surface away from the arc-breaking position. Optionally, the friction boss inclined surface includes a first inclined surface and a second inclined surface connected to each other, the first inclined surface is located close to the arc breaking position, the second inclined surface is located at the opening position, and the third inclined surface is located at the opening position. The inclination angle of one inclined surface is greater than the inclination angle of the second inclined surface. Optionally, the surface of the friction boss facing the lug is an arc surface, and the lug is pressed against the arc surface after crossing the highest point of the arc surface.

Optionally, the angle at which the lug contacts the friction boss is arc-shaped.

Optionally, the movable contact assembly includes a support turntable and a movable contact fixedly connected to the support turntable. The support turntable is driven to rotate so that the movable contact is in contact with the static contact in the static contact structure. The contacts cooperate to achieve closing or opening, and the lugs are located on the supporting turntable.

Optionally, the movable contacts and the stationary contacts each include two, the two stationary contacts cooperate with the two movable contacts respectively, the lug includes at least one, and the friction protrusion The number of platforms is greater than or equal to the number of lugs.

Optionally, the lugs include two, and the friction boss includes two groups, two lugs, two groups of friction bosses, two movable contacts and two static contacts. The heads are respectively arranged symmetrically with respect to the rotation axis of the supporting turntable.

Another aspect of the embodiment of the present disclosure provides an isolation switch, including a plurality of stacked switch units as described above, and an operating mechanism connected to the switch unit, and an operating handle is provided on the operating mechanism.

Optionally, the switch unit includes a housing, a movable contact structure according to any previous embodiment provided in the housing, a static contact and an arc extinguishing chamber, and the operating mechanism communicates with multiple switches at the same time. The first movable contact bracket and the second movable contact bracket of the movable contact structure in the unit are drivingly connected, and the static contact is connected to the first movable contact and the second movable contact bracket in the movable contact structure (100). The two movable contacts cooperate, and the arc extinguishing chamber is located on the side of the static contact.

An embodiment of the present disclosure also provides a power supply system, which may include: a DC source, a power conversion unit, and an isolation switch as described above. The switch is connected between the DC source and the power conversion unit, and is opened by operating the isolation switch when the DC source or the power conversion unit fails.

The beneficial effects of the embodiments of the present disclosure may at least include: the movable contact structure, the switch unit, the isolating switch and the power supply system provided by the embodiments of the present disclosure, through the support section and the connection sections provided at the opposite ends of the support section, between the connection section and When the static contacts are connected, an electrical connection relationship can be formed between the movable contact structure and the static contacts. When the connection section and the static contact are separated, an arc will be generated at the connection between the connection section and the static contact. In order to prompt the generated arc to be introduced into the arc extinguishing chamber for arc extinguishing in time, the connection section is separated from the support section by An arc-starting slope is formed on one side, and the arc-starting slope extends outward from the side where the connecting section is cut by the static contact, so that the arc generated at the position where the connecting section is cut by the static contact is guided outward through the arc-starting slope to avoid arcing When local (on-off position) burning is serious, the arc can also be transferred to a position closer to the arc extinguishing chamber, which is conducive to the arc quickly entering the arc extinguishing chamber for arc extinguishing.

Moreover, since the friction boss is provided on the inner wall of the housing cavity, during the opening process, the friction boss applies friction force to the lug to consume the energy of the movable contact assembly, so that the lug stays in the opening position. The setting of the friction boss can prevent the movable contact from rebounding, prevent the arc from being difficult to extinguish due to the rebound of the movable contact or the re-ignition of the arc that has been pulled off, and can also enable the movable contact to open and close smoothly without interruption. Locked. Moreover, as a part of the housing, the friction boss can be formed directly during the processing of the housing, eliminating the need to install additional parts in the housing to achieve anti-kickback. Therefore, the above-mentioned switch unit has better breaking performance, lower production cost and higher production efficiency.

In addition, the movable contact structure provided by the embodiment of the present disclosure utilizes the snap connection of the first movable contact bracket and the second movable contact bracket to combine the first spring piece, the first movable contact, the second movable contact and the second spring. The piece is fixed, and there is no need for welding or riveting between the first movable contact and the second movable contact, and there is no relative movement. The installation and disassembly are convenient, which improves the processing efficiency and reduces the cost.

Description of drawings

In order to explain the technical solutions of the embodiments of the present disclosure more clearly, the drawings needed to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present disclosure and therefore do not It should be regarded as a limitation of the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without exerting creative efforts.

Figure 1 is one of the structural schematic diagrams of the first movable contact structure provided by an embodiment of the present disclosure;

Figure 2 is a second structural schematic diagram of the first movable contact structure provided by an embodiment of the present disclosure;

Figure 3 is one of the structural schematic diagrams of the second movable contact structure provided by the embodiment of the present disclosure;

Figure 4 is the second structural schematic diagram of the second movable contact structure provided by the embodiment of the present disclosure;

Figure 5 is the third structural schematic diagram of the second movable contact structure provided by the embodiment of the present disclosure;

Figure 6 is one of the structural schematic diagrams of the third movable contact structure provided by the embodiment of the present disclosure;

Figure 7 is the second structural schematic diagram of the third movable contact structure provided by the embodiment of the present disclosure;

Figure 8 is the third structural schematic diagram of the third movable contact structure provided by the embodiment of the present disclosure;

Figure 9 is one of the structural schematic diagrams of the fourth movable contact structure provided by the embodiment of the present disclosure;

Figure 10 is the second structural schematic diagram of the fourth movable contact structure provided by the embodiment of the present disclosure;

Figure 11 is a schematic structural diagram of a movable contact structure provided by an embodiment of the present disclosure;

Figure 12 is a cross-sectional view of the movable contact structure provided by an embodiment of the present disclosure;

Figure 13 is a schematic structural diagram of the first movable contact bracket in the movable contact structure provided by the embodiment of the present disclosure;

Figure 14 is a schematic structural diagram of the second movable contact bracket in the movable contact structure provided by the embodiment of the present disclosure;

Figure 15 is a schematic structural diagram of the movable contact structure provided by the embodiment of the present disclosure after hiding the first movable contact bracket and the second movable contact bracket;

Figure 16 is a schematic structural diagram of the movable contact structure provided by the embodiment of the present disclosure after hiding the first movable contact bracket;

Figure 17 is a schematic structural diagram of the first spring leaf in the movable contact structure provided by the embodiment of the present disclosure;

Figure 18 is one of the structural schematic diagrams of the first movable contact in the movable contact structure provided by the embodiment of the present disclosure;

Figure 19 is the second structural schematic diagram of the first movable contact in the movable contact structure provided by the embodiment of the present disclosure;

Figure 20 is a schematic diagram of the movement process of the movable contact and the static contact in the switch unit provided by the embodiment of the present disclosure when opening;

Figure 21 is a schematic structural diagram of a switch unit provided by an embodiment of the present disclosure;

Figure 22 is a schematic diagram of the closing of the switch unit provided by the embodiment of the present disclosure;

Figure 23 is a schematic diagram of the opening of the switch unit provided by the embodiment of the present disclosure;

Figure 24 is a schematic structural diagram of the movable contact assembly in the switch unit provided by an embodiment of the present disclosure;

Figure 25 is one of the structural schematic diagrams of the housing in the switch unit provided by the embodiment of the present disclosure;

Figure 26 is one of the schematic diagrams of the lugs and friction bosses in the switch unit according to the embodiment of the present disclosure.

Figure 27 is a schematic diagram of the arc-shaped space formed by the lugs in the switch unit provided by the embodiment of the present disclosure;

Figure 28 is one of the structural schematic diagrams of the accommodation cavity in the switch unit provided by the embodiment of the present disclosure;

Figure 29 is the second structural schematic diagram of the housing in the switch unit provided by the embodiment of the present disclosure;

Figure 30 is the second structural schematic diagram of the accommodation cavity in the switch unit provided by the embodiment of the present disclosure; and

Figure 31 is the second schematic diagram of the lug and the friction boss in the switch unit provided by the embodiment of the present disclosure.

Figure 32 is a schematic structural diagram of an isolation switch provided by an embodiment of the present disclosure;

Figure 33 is a schematic structural diagram of an isolation switch provided by an embodiment of the present disclosure;

Figure 34 is a schematic structural diagram of an isolation switch provided by an embodiment of the present disclosure.

Icon: 100-moving contact structure; 110-support section; 111-friction boss; 1111-first inclined surface; 1112 second inclined surface; 112-accommodating cavity; 120-connecting section; 121-bending part; 122- Arc striking bevel; 124-first contact piece; 1241-first limiting boss; 1242-first connecting plate; 1244-first arc striking plate; 126-second contact piece; 1261-second limiting boss ; 1262-Second connecting plate; 1264-Second arc-starting plate; 127-Flange; 128-Arc-generating fillet; 129-Arc-starting fillet; 130-Moving contact assembly; 131-Moving contact; 1311- First moving contact; 1312-second moving contact; 132-lug; 1321-corner; 133-support turntable; 140-first moving contact bracket; 141-hook; 142-guide boss; 143- The first through groove; 144-the first groove; 145-the second protrusion; 150-the second moving contact bracket; 151-the clamping hole; 152-the clamping platform; 153-the guide groove; 154-the second through groove ; 155-first protrusion; 156-second groove; 160-first spring piece; 161-first support section; 162-first pressing section; 163-first limiting hole; 170-second spring piece ; 171-second support section; 172-second pressing section; 180-contact boss; 190-accommodation space; 200-switch unit; 210-casing; 220-rotating bracket; 230-static contact; 240 - arc extinguishing chamber; 300-isolating switch; 310-operating mechanism; 320-operating handle; 400-arc space; 410-closing position; 420-opening position; 430-arc breaking position; and 500-arc.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments These are some embodiments of the present disclosure, but not all embodiments. The components of the embodiments of the present disclosure generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Therefore, the following detailed description of the embodiments of the disclosure provided in the appended drawings is not intended to limit the scope of the claimed disclosure, but rather to represent selected embodiments of the disclosure. Based on the embodiments in this disclosure, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of this disclosure.

It should be noted that similar reference numerals and letters represent similar items in the following figures, therefore, once an item is defined in one figure, it does not need further definition and explanation in subsequent figures. In addition, in the description of the present disclosure, it should be noted that the terms "center", "upper", "lower", "left", "right", "inner", "outer", etc. indicate an orientation or positional relationship as The orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product is customarily placed during use, is only for the convenience of describing the present disclosure and simplifying the description, and does not indicate or imply that the device or component referred to must have Specific orientations, construction and operation in specific orientations and therefore should not be construed as limitations on the disclosure. The terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance.

In the description of the present disclosure, it should also be noted that, unless otherwise clearly stated and limited, the terms "set" and "connection" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection, or Integrated connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be internal connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this disclosure can be understood on a case-by-case basis.

Rotary isolation switches are usually stacked by several switch units. Each switch unit includes a shell. Each shell is equipped with corresponding moving contacts and static contacts, as well as a turret for installing the moving contacts. When the turret rotates, the movable contact and the static contact are in different states of contact, conduction or separation and disconnection, so as to control the on and off of the access line. When the movable contact and the static contact are separated, an arc will be generated. The arc will not only cause great damage to the contacts, but also prolong the time for disconnecting the circuit, causing hidden dangers to the use of the isolating switch, so it often occurs in the Each switch unit is equipped with an arc extinguishing chamber to quickly extinguish the arc by drawing and cutting the arc. In order to avoid interference with the arc extinguishing chamber when the existing movable contact rotates, a certain distance is usually set between the on-off position of the movable contact and the static contact and the arc extinguishing chamber, so that the movable contact cannot be used during use. The arc generated at the on-off position of the head enters the arc extinguishing chamber in time, causing severe burning at the on-off position of the moving contact, affecting the stability during use and the service life of the moving contact. In view of the above problems, embodiments of the present disclosure provide the following technical solutions to overcome the above problems.

Please refer to Figures 1, 2, 4, 6 and 9. This embodiment provides a movable contact structure 100, which may include a support section 110 and connecting sections 120 provided at opposite ends of the support section 110. The connecting section 120 is used to connect or disconnect with the static contact 230; the width of the side of the connecting section 120 cut by the static contact can be smaller than the width of the side of the connecting section 120 away from the side cut by the static contact; the connecting section 120 is away from the support section. An arc ignition slope 122 is formed on one side of 110 .

Specifically, the support section 110 can be used to connect with the rotating bracket of the isolation switch. When the rotating bracket rotates, the supporting section 110 is driven to rotate synchronously. At this time, the connecting sections 120 at the opposite ends of the supporting section 110 can follow the supporting section 110 to rotate. When the support section 110 rotates, it can only rotate within a specific angle, such as a 90° rotation. The connecting section 120 can be connected with the static contact during the rotation of the support section 110 to form a connection path, and can also be connected with the static contact. The head is disconnected to form an open circuit. When the connecting section 120 is separated from the static contact, an arc will be generated at the separated position. When an arc extinguishing chamber is used for When arc extinguishing, the generated arc needs to be guided into the arc-shaped space within the arc extinguishing chamber.

The arc-starting slope 122 can be formed on the connecting section 120 on a side of the connecting section 120 away from the support section 110 , that is, the arc-starting slope 122 can be formed on the outside of the connecting section 120 facing the arc extinguishing chamber. Since the width of the side of the connecting section 120 cut by the static contact is smaller than the width of the side of the connecting section 120 facing away from the fixed contact, the smaller width area of the connecting section 120 can be matched with the static contact, and the connecting section 120 The wider area extends into the arc extinguishing chamber to facilitate cooperation with the arc extinguishing chamber. Moreover, the position where the connecting section 120 and the static contact are cut and matched is also the position where the connecting section 120 and the static contact are finally separated. The arc generated at this position can move outward along the arc ignition slope 122, so that the generated arc is moved away from the arc extinguisher. Room has a closer location.

The movable contact structure 100 provided by the embodiment of the present disclosure uses the support section 110 and the connection sections 120 provided at opposite ends of the support section 110. When the connection section 120 is connected to the static contact, the movable contact structure 100 and the static contact An electrical connection can be formed between them. When the connecting section 120 and the static contact are separated, an arc will be generated at the connection between the connecting section 120 and the static contact. In order to prompt the generated arc to be introduced into the arc extinguishing chamber for arc extinguishing in time, by separating the connecting section 120 An arc striking bevel 122 is formed on one side of the support section 110, and the arc striking bevel 122 extends outward from the side of the connecting section cut by the static contact, so that the arc generated at the position where the connecting section 120 is cut by the static contact is struck. The inclined surface 122 guides outward to prevent the arc from being severely burned locally (at the on-off position), and at the same time, it can also transfer the arc to a position closer to the arc extinguishing chamber, which is conducive to the arc quickly entering the arc extinguishing chamber for arc extinguishing.

In an optional embodiment of the present disclosure, the arc-starting bevel 122 extends continuously outward from the side of the connecting section cut by the static contact. Existing isolating switch products consider their external dimensions, mechanism rotation angle, and movable contact opening speed. Often the movable contact opening angle and movable contact length are within a limited range, so in order to be able to set up more arc-extinguishing grids The front end of the moving contact is often far away from the arc extinguishing grid. At the same time, because the front end of the moving contact is mostly symmetrical, it is difficult to form a breakdown with the arc extinguishing grid to achieve the arc ignition effect, and it will also cause the gate to open. The arc generated when the moving contact cuts into the static contact has been burning and cannot be quickly transferred, resulting in serious burning damage at the cutting position, which in turn causes the closing of the moving and static contacts to be blocked. In the disclosed embodiment, through the above arrangement, the generated arc can be quickly transferred along the arc ignition slope 122 to avoid severe burning at the position where the static contact is cut, which is conducive to ensuring smooth opening and closing and extending the service life.

As shown in FIGS. 1 , 3 , 6 and 9 , the connecting section 120 may include a first contact piece 124 and a second contact piece 126 arranged oppositely, and a first contact piece 124 and a second contact piece 126 may be formed between them. There is an accommodating space for inserting the static contacts, and the arc starting slopes 122 are respectively located on the first contact piece 124 and the second contact piece 126.

Specifically, through the first contact piece 124 and the second contact piece 126 that are arranged oppositely, when the connecting section 120 is connected to the static contact, the static contact can be inserted between the first contact piece 124 and the second contact piece 126, and The first contact piece 124 and the second contact piece 126 can be connected to the static contact at the same time, which is beneficial to increasing the contact area between the connecting section 120 and the static contact and reducing heat generation at the connection. After an arc is generated on the side of the connecting section 120 that cuts into the static contact, the arc can move along the arc-starting slopes 122 of the first contact piece 124 and the second contact piece 126 respectively, away from the side of the connecting section that cuts into the static contact, to avoid generating The arc burns for a long time on the side where the connecting section 120 cuts into the static contact.

As shown in Figures 1, 3 and 6, the arc-generating fillet 128 can be provided at the access position of the arc-starting bevel 122. The above-mentioned access position is on the side where the arc-starting bevel 122 and the connecting section 120 cut into the static contact. The angle position formed. The lead-out position of the arc-starting bevel 122 is provided with an arc-starting fillet 129. The lead-out position is the angle formed by the arc-starting bevel 122 and the side of the connecting section 120 away from the side that cuts into the static contact.

Specifically, when the connecting section 120 is separated from the static contact, the arc is generated at the arc-generating rounded corner 128. By setting the rounded corner, it has better burning resistance compared with the sharp cornered form. property, which is beneficial to ensuring the stability of the connection between the connecting section 120 and the static contact. After an arc is generated at the arc-generating fillet 128 of the connecting section 120, the arc can move toward the arc-starting fillet 129 along the arc-starting bevels 122 of the first contact piece 124 and the second contact piece 126, respectively, to prevent the generated arc from being generated. Long-term burning at arc fillet 128. Among them, the arc-generating fillet 128 corresponds to the direction in which the static contact cuts in, and the arc-starting fillet 129 can penetrate deep into the narrow gap of the arc extinguishing chamber. In this way, the arc generated at the arc-generating fillet 128 can be discharged in time. It is conducted along the arc-starting bevel 122 to the arc-starting fillet 129 so as to break down with the grid in the arc-extinguishing chamber and be divided by the grid to extinguish the arc.

As shown in Figures 1, 3, 6 and 9, in an optional embodiment of the present disclosure, the first contact piece 124 and the second contact piece 126 are arranged in parallel or at a preset angle; the first contact piece 124 The side where the second contact piece 126 cuts into the static contact may be provided with flanges 127 respectively, and the two flanges 127 are folded toward opposite sides.

When the first contact piece 124 and the second contact piece 126 are arranged in parallel, they can better cooperate with the static contacts to ensure stability during connection. When the first contact piece 124 and the second contact piece 126 form a preset angle, it is necessary to ensure that the distance between the first contact piece 124 and the second contact piece 126 is larger on the side where the static contact is cut. And the distance deep into the arc extinguishing chamber is smaller. At this time, the static contacts can also be set at a certain angle to facilitate stable contact with the first contact piece 124 and the second contact piece 126 respectively. At the same time, The smaller spacing is beneficial to extending into the arc extinguishing chamber for arc extinguishing. In addition, by respectively providing flanges 127 on the side where the first contact piece 124 and the second contact piece 126 cut into the static contact, and the two flanges 127 are folded toward the opposite side, the flange 127 can play a role. The function of guiding the static contacts into the accommodating space to improve the smoothness during mating.

As shown in Figures 2, 5, 8 and 10, the support section 110 can be arranged in a straight line, and the angle between the plane where the arc-starting slope 122 is located and the extension direction of the support section 110 can be 100° to 140°.

Specifically, the angle between the plane where the arc-starting bevel 122 is located and the extension direction of the support section 110 is α. When α<100°, the slope of the arc-starting bevel 122 is larger. When the movable contact is opened, the static contact arc-starting piece The distance from the arc root to the arc-generating fillet 128 is basically the same as the distance from the arc root to the arc-generating fillet 129 on the arc-starting piece. Then the arc root on the connecting section 120 wants to be transferred from the arc-generating fillet 128 to the arc-starting corner. It is very difficult to fillet the corner 129, which will cause the arc root to stay at the arc-generating corner 128 and continue to burn. Not only does the arc elongation not be used, but it is also not conducive to closing; when α>140°, in order to ensure that the dynamic and static contacts The contact area, when the width of the side where the connecting section 120 cuts into the static contact remains unchanged, will cause the arc arc fillet 129 to go too deep into the arc extinguishing chamber, and may even interfere with the grid plate, and the α angle is too large, causing the arc extinguishing chamber to be too deep. The fillet at arc fillet 129 is very sharp and has a small cross-section, which is very easy to burn, thus affecting the electrical life. In order to ensure the stability of arc guidance, the above included angle needs to be kept within an appropriate range. For example, α can be set to values such as 100°, 110°, 120°, 130° or 140°.

In an optional embodiment of the present disclosure, the arc-starting fillet 129 protrudes from the arc-starting bevel 122 (shown in FIG. 2 ).

It can be understood that the arc-starting inclined surface 122 can be a flat surface, a curved surface or a surface with a bending angle, as long as the overall inclination is ensured to be within the above-mentioned angle range. In addition, when the arc starting bevel 122 is non-planar, the overall smoothness of the arc starting bevel 122 needs to be ensured to ensure the stability of arc guidance. In addition, by arranging the arc-starting fillet 129 to protrude from the arc-starting slope 122, it is beneficial to ensure that more materials can be used for arc burning at the arc-starting corner 129, which is beneficial to prolonging the service life.

As shown in FIGS. 3 and 4 , in an optional embodiment of the present disclosure, the first contact piece 124 and the second contact piece 126 may be provided with a bending portion 121 respectively, so that the first contact piece 124 forms a mutually reciprocal shape. The connected first connecting plate 1242 and the first arc starting plate 1244, and the second contact piece 126 form a second connecting plate 1262 and a second arc starting plate 1264 that are connected to each other; the first connecting plate 1242 is parallel to the second connecting plate 1262 , the first arc starting plate 1244 and the second arc starting plate 1264 are bonded.

Specifically, by arranging the first connecting plate 1242 and the second connecting plate 1262 in parallel, when the connecting section 120 cooperates with the static contact, the static contact can be cut between the first connecting plate 1242 and the second connecting plate 1262 position, and are respectively connected to the first connecting plate 1242 and the second connecting plate 1262 to form the required connection relationship. In addition, by fitting the first arc starting plate 1244 and the second arc starting plate 1264, the arc starting fillets 129 of the first contact piece 124 and the second contact piece 126 are merged together, which is beneficial to improving the arc starting fillet 129 The anti-burning ability is improved to extend the service life of the moving contact structure 100 . At the same time, the first arc ignition plate 1244 and the second arc ignition plate 1264 fit together, which is beneficial to ensuring that the connecting section 120 has a narrower spacing at the position where it extends into the arc extinguishing chamber, so as to penetrate deeply into the narrow gap of the arc extinguishing chamber.

As shown in FIGS. 6 and 7 , in another optional embodiment of the present disclosure, bending portions 121 may be provided on the first contact piece 124 and the second contact piece 126 respectively, so that the first contact piece 124 forms a There are a first connecting plate 1242 and a first arc starting plate 1244 that are connected to each other, and the second contact plate 126 is formed with a second connecting plate 1262 and a second arc starting plate 1264 that are connected to each other; the first connecting plate 1242 and the second connecting plate 1262 is parallel, the first arc starting plate 1244 and the second arc starting plate 1264 are parallel or have a preset angle, and the distance between the first connecting plate 1242 and the second connecting plate 1262 is greater than the distance between the first arc starting plate 1244 and the second arc starting plate 1262 The distance between arc striking plates 1264.

Specifically, by arranging the first connecting plate 1242 and the second connecting plate 1262 in parallel, when the connecting section 120 cooperates with the static contact, the static contact can be cut between the first connecting plate 1242 and the second connecting plate 1262 position, and are respectively connected to the first connecting plate 1242 and the second connecting plate 1262 to form the required connection relationship. In addition, by arranging the first arc starting plate 1244 and the second arc starting plate 1264 parallel or with a preset angle, the distance between the first connecting plate 1242 and the second connecting plate 1262 can be larger than the first arc starting plate 1244 The distance between the arc ignition plate 1264 and the second arc ignition plate 1264 is such that while reducing the distance at the position where the connecting section 120 extends into the arc extinguishing chamber, the arc can be ignited along the first contact piece 124 and the second contact piece 126 respectively. The bevel 122 is conductive, which not only ensures that the arc is transmitted to the arc ignition fillet 129 in time, but also facilitates cooperation with the narrow slit of the arc extinguishing chamber.

As shown in FIG. 9 , the first contact piece 124 may be provided with a bending portion 121 so that the first contact piece 124 is formed with a first connecting plate 1242 and a first arc ignition plate 1244 that are connected to each other, and the second contact piece 126 is only Includes a second connecting plate 1262 corresponding to the first connecting plate 1242; the first connecting plate 1242 and the first arc starting plate 1244 can be parallel to the second connecting plate 1262 respectively, and the first arc starting plate 1244 is located on the first connecting plate 1242 between the plane where it is located and the plane where the second connecting plate 1262 is located.

Using the above form, by arranging the first connecting plate 1242 and the second connecting plate 1262 in parallel, when the connecting section 120 cooperates with the static contact, the static contact can be cut into the first connecting plate 1242 and the second connecting plate 1262. positions between them, and are respectively connected to the first connecting plate 1242 and the second connecting plate 1262 to form the required connection relationship. In addition, the generated arc can be conducted to the arc striking corner 129 along the arc striking slope 122 of the first contact piece 124, and the first arc striking plate 1244 is located between the plane of the first connecting plate 1242 and the plane of the second connecting plate 1262. time, which is conducive to better reducing the distance between the connecting section 120 and the arc extinguishing chamber, so as to better cooperate with the arc extinguishing chamber.

In an optional embodiment of the present disclosure, the movable contact structure 100 can be provided in one piece, or the movable contact structure 100 can include a first body and a second body arranged oppositely, and the first body and the second body are connected to form a support. Segment 110 and connecting segment 120.

For example, the moving contact structure 100 can be made by integral stamping and bending to ensure better consistency of the moving contact structure 100 and ensure assembly quality. The first body and the second body, which are oppositely arranged, can also be connected by welding or riveting, as long as the required structural form can be met.

In an optional embodiment of the present disclosure, with reference to FIGS. 11 and 12 , a movable contact structure 100 is provided, including: a first movable contact bracket 140 and a second movable contact bracket 150 that are snap-locked to each other, and The first spring piece 160, the first movable contact 1311, the second movable contact 1312 and the second spring piece 170 fixed between the first movable contact bracket 140 and the second movable contact bracket 150 are sequentially clamped. An accommodating space 190 is formed between the first movable contact 1311 and the second movable contact 1312. The accommodating space 190 is used to accommodate the stationary contact. The first spring piece 160 and the second spring piece 170 are in the first movable contact bracket. Under the clamping action of 140 and the second movable contact bracket 150, the first movable contact 1311 and the second movable contact 1312 are respectively exerted pressure to approach each other.

The first spring piece 160, the first movable contact 1311, the second movable contact 1312 and the second spring piece 170 are independent of each other and are stacked in sequence. The first movable contact bracket 140 and the second movable contact bracket 150 are respectively located at the first movable contact bracket 140 and the second movable contact bracket 150. One spring piece 160 and the outside of the second spring piece 170 . The first movable contact bracket 140 and the second movable contact bracket 150 are clamped and fixed, and at the same time, the first spring piece 160, the first movable contact 1311, the second movable contact 1312 and the second spring piece 170 are clamped fixed between the two.

After the first movable contact 1311 and the second movable contact 1312 are clamped and fixed, an accommodating space 190 for accommodating the stationary contacts is formed between them. This accommodating space 190 can be formed by connecting the first movable contact It is formed by providing a spacing structure between the first movable contact 1311 and the second movable contact 1312, or by changing the shapes of the first movable contact 1311 and the second movable contact 1312 themselves. The first movable contact bracket 140 and the second movable contact bracket 150 are driven (such as driven by the operating mechanism 310 (often also referred to as an action mechanism)) to rotate back and forth between the closing position and the opening position. The spring piece 160, the first movable contact 1311, the second movable contact 1312 and the second spring piece 170 follow the rotation of the first movable contact bracket 140 and the second movable contact bracket 150. When rotating to the closing position, the static The contacts are cut into the accommodation space 190, and both sides are respectively in contact with the first movable contact 1311 and the second movable contact 1312 to achieve closing; when rotated to the opening position, the static contacts are cut out of the accommodation space 190, Separate from the first movable contact 1311 and the second movable contact 1312 to achieve opening. The first spring piece 160 and the second spring piece 170 are respectively pressed against the surfaces of the first movable contact 1311 and the second movable contact 1312 to always maintain contact pressure during the closing and opening process.

The above-mentioned movable contact structure 100 utilizes the snap connection of the first movable contact bracket 140 and the second movable contact bracket 150 to connect the first spring piece 160, the first movable contact 1311, the second movable contact 1312 and the second spring. The piece 170 is fixed, and there is no need for welding or riveting between the first movable contact 1311 and the second movable contact 1312, and no relative movement occurs. The installation and disassembly are convenient, which improves the processing efficiency and reduces the cost.

Please refer to Figure 13 and Figure 14 in conjunction. Alternatively, in an implementable manner of the embodiment of the present disclosure, the first moving contact bracket 140 is provided with a hook 141, and the second moving contact bracket 150 is provided with a hook 141. The hook 141 is inserted into the clamping hole 151. The inner wall of the clamping hole 151 is provided with a clamping platform 152. The hook 141 can hook the clamping platform 152 so that the first moving contact bracket 140 and the second moving contact bracket 150 are clamped together. .

Preferably, there are multiple hooks 141 , and the plurality of hooks 141 are evenly distributed along the circumferential direction of the first movable contact bracket 140 ; correspondingly, the hooks 151 and the platform 152 also include multiple hooks 141 . One-to-one corresponding settings. The plurality of hooks 141 and the clamping platform 152 are simultaneously engaged, which can improve the stability of the connection between the first movable contact bracket 140 and the second movable contact bracket 150 and prevent them from being accidentally separated.

For example, the first moving contact bracket 140 is provided with a guide boss 142, and the second moving contact bracket 150 is provided with a guide groove 153 that matches the guide boss 142, or the second moving contact bracket 150 is provided with a guide boss 142. A guide boss 142 is provided, and the first moving contact bracket 140 is provided with a guide groove 153 that matches the guide boss 142; the guide boss 142 extends into the guide groove 153 to guide the first moving contact bracket 140 and the second movable contact bracket 150 are aligned with each other to complete the snap connection. Preferably, each of the guide bosses 142 and the guide grooves 153 includes at least two, and are evenly distributed along the circumferential direction of the first movable contact bracket 140 or the second movable contact bracket 150 .

Referring to Figure 15, optionally, in an implementable manner of the embodiment of the present disclosure, abutment bosses 180 are provided on the surfaces of the first movable contact 1311 and/or the second movable contact 1312 that are close to each other. The first movable contact 1311 and the second movable contact 1312 resist each other through the abutment boss 180 to form an accommodation space 190 .

The contact boss 180 protrudes from the surface of the first movable contact 1311 and/or the second movable contact 1312, and is clamped and fixed to the first movable contact 1311 and/or the second movable contact 1312. Between the bracket 140 and the second movable contact bracket 150, the surfaces where the first movable contact 1311 and the second movable contact 1312 are close to each other are separated from each other to form the above-mentioned accommodation space 190. What is shown in FIG. 15 is an embodiment in which the first movable contact 1311 and the second movable contact 1312 are both provided with abutment bosses 180 , and they resist each other through their own abutment bosses 180 . In other embodiments, the contact boss 180 may also be provided only on the first movable contact 1311 or the second movable contact 1312 , and the surface of the movable contact without the contact boss 180 and the contact boss 180 may be disposed. Resisting, in this way, an accommodating space 190 can also be formed between the first movable contact 1311 and the second movable contact 1312 . However, the solution of providing the abutment boss 180 on the first movable contact 1311 and the second movable contact 1312 at the same time can make the structures of the first movable contact 1311 and the second movable contact 1312 consistent, without additional distinction, and facilitate Mass production and processing.

Please refer to Figure 13, Figure 14 and Figure 16. Alternatively, in an implementable manner of the embodiment of the present disclosure, the first moving contact bracket 140 is provided with a first through groove 143, and the second moving contact bracket 150 is provided with a second through groove 154 corresponding to the position of the first through groove 143. The first through groove 143 and the second through groove 154 are used to accommodate the first spring piece 160, the first movable contact 1311, the second movable contact head 1312 and second spring leaf 170.

The first through-groove 143 penetrates the peripheral wall of the first movable contact bracket 140 at both ends in its extending direction, and the second through-groove 154 penetrates the peripheral wall of the second movable contact bracket 150 at both ends in its extending direction, so that Both ends of the first spring piece 160 , the first movable contact 1311 , the second movable contact 1312 and the second spring piece 170 can extend from the first movable contact bracket 140 and the second movable contact bracket 150 . The first through groove 143 and the second through groove 154 The positions correspond to each other in the direction of the rotation axis of the first movable contact bracket 140 to jointly accommodate the stacked first spring piece 160 , the first movable contact 1311 , the second movable contact 1312 and the second spring piece 170 .

For example, first protrusions 155 are respectively provided on two opposite side walls of the second through-groove 154 , and the first protrusions 155 respectively resist the opposite two sides of the second spring piece 170 . After the second spring piece 170 is installed, the first protrusion 155 can play a limiting role on the second spring piece 170 to prevent it from rotating in the second through groove 154 . At the same time, there is a small area of contact between the first protrusion 155 and the second spring piece 170, and the small area of contact makes it easier to ensure processing accuracy.

For example, first grooves 114 are provided on opposite sides of the first through-groove 143 , and the first grooves 114 are connected with the first through-groove 143 . The first movable contact 1311 is provided with first grooves 114 on opposite sides of the first through-groove 143 . The second protrusion 145 matched with the groove 114; second grooves 156 are respectively provided on opposite sides of the second through-groove 154. The second groove 156 is connected with the second through-groove 154, and the second movable contact 1312 is opposite to the second protrusion 145. Third protrusions matching the second groove 156 are respectively provided on both sides. The first groove 114 and the second groove 156 are used to guide the installation of the first spring piece 160 and the second spring piece 170 and to limit them after installation to prevent them from being in the first through groove 143 and the second groove 156 . The second through groove 154 rotates inside. Moreover, there is also a small area of contact between the first groove 114 and the second protrusion 145 and between the second groove 156 and the third protrusion, making it easier to ensure processing accuracy.

Please refer to Figures 15 and 17. Alternatively, in an implementable manner of the embodiment of the present disclosure, the first spring piece 160 includes a first support section 161 and a first urging section disposed on the first support section 161. 162. The first support section 161 resists the first movable contact bracket 140, and the end of the first pressing section 162 extends toward the first movable contact 1311 and resists the first movable contact 1311; the second spring piece 170 includes The second support section 171 and the second pressing section 172 provided on the second support section 171 , the second support section 171 resists the second movable contact bracket 150 , and the end of the second pressing section 172 faces the second movable contact 1312 extends and resists the second movable contact 1312.

After the first movable contact bracket 140 and the second movable contact bracket 150 are clamped, the first movable contact bracket 140 resists the first support section 161 , and the second movable contact bracket 150 resists the second support section 171 Hold to exert a clamping force on the first spring piece 160 and the second spring piece 170 to fix them. One end of the first spring section 162 is connected to the first support section 161 , and the other end extends toward and resists the first movable contact 1311 . One end of the second spring section 172 is connected to the second support section 171 , and the other end extends toward the second movable contact 1311 . The movable contact 1312 extends and resists it. Under the action of the clamping force of the first movable contact bracket 140 and the second movable contact bracket 150, the first elastic pressure section 162 and the second elastic pressure section 172 respectively press against the first movable contact. The head 1311 and the second movable contact 1312 exert pressure toward each other.

For example, the first urging section 162 includes two, and the two first urging sections 162 are respectively provided at two opposite ends of the first support section 161; the second urging section 172 includes two, and the two second urging sections 172 are respectively provided. at opposite ends of the second support section 171 . This structure corresponds to the structure of the first movable contact 1311 and the second movable contact 1312. The two first pressing sections 162 can respectively exert pressure on the two ends of the first movable contact 1311 that cooperate with the static contacts. The second pressing sections 172 can exert pressure on the two ends of the second movable contact 1312 that cooperate with the static contacts respectively.

Optionally, in an implementable manner of the embodiment of the present disclosure, the first pressing section 162 resists the area of the first movable contact 1311 that cuts into the stationary contact, and the second pressing section 172 resists the second movable contact. 1312 is cut into the area of the static contact to resist.

During the closing and opening process, the stationary contact cuts in between the first movable contact 1311 and the second movable contact 1312 from one side, and cuts out from the same side during reversal. The area on the first movable contact 1311 that cuts into the stationary contact refers to the area on the first movable contact 1311 that contacts the stationary contact when the stationary contact cuts in between the first movable contact 1311 and the second movable contact 1312 , it can be understood that this area is also the area where the static contacts are cut out. Similarly, the area where the second movable contact 1312 cuts into the stationary contact means that when the stationary contact cuts in between the first movable contact 1311 and the second movable contact 1312, the second movable contact 1312 contacts the stationary contact. It can be understood that this area is also the area where the static contacts are cut out. The first pressing section 162 is set to resist the area of the first movable contact 1311 that cuts into the static contact, and the second pressing section 172 is set to resist the area of the second movable contact 1312 that cuts into the static contact. Better maintain contact pressure during closing and opening.

Please refer to Figures 12, 17 and 18. Alternatively, in an implementable manner of the embodiment of the present disclosure, a first limiting boss is provided on the surface of the first movable contact 1311 facing the first spring piece 160. 1241. The first spring piece 160 is provided with a first limiting hole 163 that cooperates with the first limiting boss 1241. The first limiting boss 1241 is used to prevent the first spring piece 160 from rotating. The first spring piece 160 can Slide along the first limiting boss 1241 to approach or move away from the first spring piece 160; the second movable contact 1312 is provided with a second limiting boss 1261 on the surface facing the second spring piece 170. A second limiting hole is provided that cooperates with the second limiting boss 1261. The second limiting boss 1261 is used to prevent the second spring leaf 170 from rotating. The second spring leaf 170 can slide along the second limiting boss 1261. , to be close to or away from the second spring leaf 170 .

The first limiting boss 1241, the first limiting hole 163, the second limiting boss 1261 and the second limiting hole are arranged between the first spring piece 160 and the first movable contact 1311. The second spring piece A gap is formed between 170 and the second movable contact 1312 to ensure that the first spring leaf 160 and the second spring leaf 170 are not pressed when the first movable contact 1311 and the second movable contact 1312 are opened.

For example, the first limiting boss 1241 and the second limiting boss 1261 are waist-shaped bosses, the first limiting hole 163 and the second limiting hole are waist-shaped holes, and the waist-shaped holes are in contact with the first spring piece 160 Or the angle between the length directions of the second spring piece 170 is an acute angle or an obtuse angle to prevent the first spring piece 160 and the second spring piece 170 from being installed in the wrong direction.

Referring to Figure 19, optionally, in an implementable manner of the embodiment of the present disclosure, the first movable contact 1311 and the second movable contact 1312 both include The third support section 110 and the connection sections 120 provided at opposite ends of the third support section 110. The connection sections 120 are used to connect or disconnect with the static contacts; the width of one side of the connection section 120 where the static contacts are cut (in the figure B1) is smaller than the width of the side of the connecting section 120 away from the stationary contact cut (B2 in the figure), so as to form an arc-starting slope 122 on the side of the connecting section 120 away from the third support section 110 .

When the first moving contact bracket 140 and the second moving contact bracket 150 rotate, the third support section 110 rotates synchronously. At this time, the connecting sections 120 located at opposite ends of the third support section 110 follow the rotation of the third support section 110 . During the rotation process of the connecting section 120 following the third support section 110, it can contact and close with the static contact, and can also separate and open from the static contact. When the connecting section 120 is separated from the static contact, an arc will be generated at the separation position. When an arc extinguishing chamber is used to extinguish the arc, the generated arc needs to be guided into the arc extinguishing chamber by positioning the connecting section 120 away from the third support section 110 An arc ignition slope 122 is provided on one side of the connecting section 120 so that the smaller width area of the connecting section 120 can cooperate with the static contact, and the larger width area can extend into the arc extinguishing chamber to facilitate cooperation with the arc extinguishing chamber. Moreover, the position where the connecting section 120 and the static contact are cut and matched is also the final separation position. The arc generated at this position can move outward along the arc starting slope 122, so that the generated arc moves closer to the arc extinguishing chamber. Location.

Optionally, in an implementable manner of the embodiment of the present disclosure, the lead-out position of the arc-starting bevel 122 is provided with an arc-starting fillet 129, and the lead-out position is located at a point between the arc-starting bevel 122 and the connecting section 120 away from the insertion of the static contact. The angle formed by the sides.

Specifically, when the connecting section 120 is separated from the stationary contact, the generated arc can move toward the arc-starting fillet 129 along the arc-starting slopes 122 of the first movable contact 1311 and the second movable contact 1312 respectively, causing The arc fillet 129 can penetrate deep into the narrow gap of the arc extinguishing chamber. In this way, the arc generated by separation can be conducted to the arc striking fillet 129 along the arc starting slope 122 in time, so that it can be broken down by the grid in the arc extinguishing chamber. , and are divided by the grid pieces to extinguish the arc.

As shown in Figure 21, the embodiment of the present disclosure also discloses a switch unit 200, which may include a housing 210 and a rotating bracket 220 provided in the housing 210. The rotating bracket 220 may be provided with the moving parts in the previous embodiment. Contact structure 100; the housing 210 may also be provided with a static contact 230 corresponding to the movable contact structure 100, and an arc extinguishing component corresponding to the static contact 230. Among them, the arc extinguishing component can adopt the structural form of the arc extinguishing chamber 240 in Figure 21, or can use the combination of a permanent magnet and an arc extinguishing channel to perform arc extinguishing. The switch unit 200 includes the same structure and beneficial effects as the movable contact structure 100 in the previous embodiment. The structure and beneficial effects of the movable contact structure 100 have been described in detail in the foregoing embodiments and will not be described again here.

Please refer to Figures 34 and 20. The present disclosure provides a switch unit 200 and an isolation switch 300. The isolation switch 300 may include an operating handle 320, an operating mechanism 310 connected to the operating handle 320, and a plurality of stacked switch units 200. The operation The mechanism 310 is drivingly connected to the movable contact assembly 130 in the switch unit 200 of each layer, whereby the operating handle 320 is used to control the operating mechanism 310 to close and open the switch unit 200 of each layer. Since multiple switch units 200 have a multi-layer series connection structure, the transmission between each level causes the transmission to be out of synchronization due to the existence of gaps. Therefore, in a single switch unit 200, taking the straight line where the static contact 230 is located as the baseline, if the operating mechanism 310 limits the moving contact 131 to 90°, then the housing 210 of the switch unit 200 limits the moving contact 131 to greater than 90° (for example, 120°). When the operating mechanism 310 stops, the movable contact 131 can still move forward by inertia. When the movable contact 131 rotates at high speed, the inertia is large. Therefore, after reaching the maximum angle, it will rebound and swing back and forth (as shown by the dotted line in Figure 20 As shown), it stops at the opening position after the energy is exhausted (as shown by the solid line in Figure 20). During the reciprocating motion of the above-mentioned movable contact 131, the distance between the contacts of the movable contact 131 and the static contact 230 is constantly changing. When the distance is greater than the arc breaking distance, the arc 500 generated by the opening is broken. When the movable contact 131 rebounds and causes the distance to be smaller than the arc breaking distance, the broken arc 500 may re-ignite. The reciprocating swing of the movable contact 131 may cause the arc 500 to be difficult to extinguish or the arc 500 that has been pulled out and extinguished may be rekindled. In view of this, the present disclosure is proposed. The embodiments of the present disclosure will be described below with reference to the accompanying drawings.

Referring to Figures 22 to 26, this embodiment provides a switch unit 200, which includes a housing 210, a static contact structure disposed in the housing 210, and a moving contact assembly 130 that cooperates with the static contact structure. The contact assembly 130 is provided with lugs 132, and the housing 210 is provided with an accommodation cavity 112 for accommodating the movable contact assembly 130. The inner wall of the accommodation cavity 112 is provided with a friction boss 111, and the movable contact assembly 130 and the static contact assembly 130 are provided with a friction boss 111. When the contact structure is opened, the lug 132 is pressed against the friction boss 111 so that the lug 132 stays in the open position 420 .

Referring to Figures 22 and 23, the switch unit 200 includes a housing 210 and a static contact structure and a moving contact assembly 130 disposed in the housing 210. The moving contact assembly includes a moving contact 131, and the static contact structure includes a static contact assembly. The contacts 230 and the movable contacts 131 rotate back and forth in the housing 210 to contact the stationary contacts 230 for closing or separation. Please refer to Figures 24 to 26 in conjunction. The movable contact assembly is provided with lugs 132. The lugs 132 are used to contact the friction boss 111 on the inner wall of the housing 210. The lugs 132 can be provided on the movable contact 131. It can also be provided on other parts in the movable contact assembly that are fixedly connected to the movable contact 131 . The friction boss 111 is fixedly provided on the inner wall of the cavity 112 in the housing 210. When the movable contact 131 and the static contact 230 are opened, the lug 132 moves toward the friction boss 111, and the friction boss 111 exerts force on the lug 132. The friction force consumes the energy of the movable contact assembly 130. After the energy of the movable contact assembly 130 is exhausted, the lug 132 presses against the surface of the friction boss 111, thereby limiting the lug 132 to the opening position 420. , at this time, the opening of the movable contact 131 and the static contact 230 is completed. By arranging the friction boss 111 on the inner wall of the accommodating cavity 112, the rebound of the movable contact 131 is prevented, and the arc 500 that is difficult to extinguish or the arc 500 that has been broken due to the rebound of the movable contact 131 is prevented from rekindling. . At the same time, the friction boss 111 can also enable the movable contact 131 to open and close smoothly without being locked. It should be understood that the friction boss 111 and the lugs 132 cannot be too protruding, and they must be able to resist each other but not hinder the rotation of the movable contact 131. The friction boss 111 and the lugs 132 make use of the accommodation cavity 112. The narrow space between the inner wall and the moving contact assembly 130 achieves frictional deceleration and squeeze resistance.

For example, a deceleration boss can also be provided on the movement path of the lug 132. When the movable contact 131 and the static contact 230 are opened, the lug 132 first crosses the deceleration boss to decelerate, and then contacts the friction boss. 111 contacts, and finally stays at the opening position 420.

In the above-mentioned switch unit 200, a friction boss 111 is provided on the inner wall of the cavity 112 in the housing 210. During the opening process, the friction boss 111 applies friction force to the lug 132 to consume the energy of the movable contact assembly 130, causing the lug 132 to dissipate. The ear 132 stays in the opening position 420. The setting of the friction boss 111 can prevent the movable contact 131 from rebounding, prevent the arc 500 from being difficult to extinguish or the arc 500 that has been broken due to the rebound of the movable contact 131 to rekindle, and can also make the movable contact 131 smooth. Realize opening and closing without being locked. Moreover, the friction boss 111, as a part of the housing 210, can be directly formed when processing the housing 210, and anti-rebound can be achieved without installing additional parts in the housing 210. Therefore, the above-mentioned switch unit 200 has better breaking performance, lower production cost and higher production efficiency.

Please refer to Figures 24 and 27. Alternatively, in an implementable manner of the embodiment of the present disclosure, the lug 132 rotates with the movable contact assembly to divide an arc-shaped space 400 in the housing 210. The arc-shaped space 400 has an arc-breaking position 430 and an opening position 420. The friction boss 111 is located at the opening position 420 of the arc-shaped space 400 and extends toward the arc-breaking position 430.

The lug 132 rotates along with the movable contact assembly 130 to define an arc-shaped space 400 in the housing 210 . The arc-shaped space 400 is the space swept by the lug 132 during its reciprocating rotation. Please refer to Figure 20 in combination. When the movable contact 131 and the static contact 230 are in the closing state, the position of the lug 132 in the arc-shaped space 400 corresponds to the closing position 410 of the arc-shaped space 400; When the contact 230 is in the opening state, the position of the lug 132 in the arc-shaped space 400 corresponds to the opening position 420 of the arc-shaped space 400; the movable contact 131 and the stationary contact 230 are in the process of opening (not yet in the open state), an arc 500 will be generated between the two, and the arc 500 will be gradually broken as the distance between the movable contact 131 and the static contact 230 increases. When the arc 500 is broken, the lug The position of 132 in the arc-shaped space 400 corresponds to the arc-breaking position 430 of the arc-shaped space 400 . That is, when the lug 132 is located between the closing position 410 and the arc-breaking position 430, there is an arc 500 between the movable contact 131 and the static contact 230; when the lug 132 is located between the arc-breaking position 430 and the opening position, 420, the arc 500 between the movable contact 131 and the stationary contact 230 is broken and extinguished. It should be understood that the arc breaking position 430 is located between the closing position 410 and the opening position 420. Different from the closing position 410 and the opening position 420, the arc breaking position 430 can be a straight line or an area. The position of 430 can be obtained through experimentation.

Please refer to Figures 26 to 28. Alternatively, in an implementable manner of the embodiment of the present disclosure, the surface of the friction boss 111 facing the lug 132 is inclined, and the end of the inclined surface close to the arc breaking position 430 is lower than the inclined surface and away from it. One end of arc breaking position 430.

The friction boss 111 is fixedly provided on the inner wall of the inner cavity 112 of the housing 210 and extends into the opening position 420 of the arc-shaped space 400 . The friction boss 111 extends from the opening position 420 toward the arc breaking position 430 .

During the opening process, after the lug 132 comes into contact with the friction boss 111, it shows a climbing movement trend. The degree of extrusion between the lug 132 and the surface of the friction boss 111 gradually increases. The friction force exerted by the friction boss 111 on the lug 132 The friction force also gradually increases, and finally, the friction boss 111 exhausts the energy of the movable contact assembly 130, causing the lug 132 to stay in the opening position 420 and maintain the extrusion and resistance state with the friction boss 111. When closing, the lug 132 moves in the opposite direction to that when opening, showing a downward slope movement trend. The degree of extrusion between the lug 132 and the surface of the friction boss 111 gradually decreases, and finally separates from the friction boss 111. , moving towards the closing position 410. The friction boss 111 with an inclined surface can not only prevent the movable contact 131 from rebounding, but also ensure that the movable contact 131 can open and close smoothly without being locked.

It should be noted that the friction boss 111 has two opposite ends along the movement path of the lug 132 , one of which is located on the side of the opening position 420 away from the arc breaking position 430 , and the other end may be located on the breaking position 430 . Between the arc position 430 and the opening position 420, it may also be located at the arc breaking position 430, or on the side of the arc breaking position 430 away from the opening position 420.

The inclined surface in this embodiment may be an inclined plane, or may be formed by connecting in sequence at least two sub-inclined surfaces with different degrees of inclination.

Optionally, in an implementable manner of the embodiment of the present disclosure, the inclined plane includes a first inclined plane 1111 and a second inclined plane 1112 that are connected to each other. The first inclined plane 1111 is located close to the arc breaking position 430 and the second inclined plane 1112 is located at the opening position. At position 420, the inclination angle of the first inclined surface 1111 is greater than the inclination angle of the second inclined surface 1112.

The vertical distance between the two opposite edges of the first inclined surface 1111 along the inclined direction is greater than the vertical distance between the two opposite edges of the second inclined surface 1112 along the inclined direction. During the opening process, the lug 132 first contacts the first inclined surface 1111. The first inclined surface 1111 has a large inclination, which can provide a large friction force to the lug 132, quickly consume the energy of the moving contact assembly, and reduce the moving contact. The speed of the head assembly; after the lug 132 crosses the first inclined plane 1111, it contacts the second inclined plane 1112. The second inclined plane 1112 has a smaller degree of inclination, which provides smaller friction force to the lug 132, causing the moving contact assembly to slowly decelerate. , finally, the lug 132 presses against the second inclined surface 1112 and stays at the opening position 420 smoothly.

Please refer to FIGS. 29 to 31 . Alternatively, in an implementable manner of the embodiment of the present disclosure, the surface of the friction boss 111 facing the lug 132 is an arc surface, and the lug 132 crosses the highest point of the arc surface and is in contact with the lug 132 . The curved surface squeezes and resists.

During the opening process, after the lug 132 comes into contact with the friction boss 111, it shows a climbing movement trend. The degree of extrusion between the lug 132 and the surface of the friction boss 111 gradually increases. The friction force exerted by the friction boss 111 on the lug 132 The friction force also gradually increases, rapidly consuming the energy of the moving contact assembly; after the lug 132 crosses the highest point of the friction boss 111, the friction boss 111 blocks the lug 132 from rebounding, causing the lug 132 to stay at the opening position 420 and Holding and friction boss 111 The squeeze resistance state. When closing, the lug 132 moves in the opposite direction to that when opening. After crossing the highest point of the friction boss 111, it shows a downward slope movement trend. The degree of extrusion between the lug 132 and the surface of the friction boss 111 gradually decreases. Finally, it is separated from the friction boss 111 and moves to the closing position 410. The friction boss 111 with an arcuate surface can not only prevent the movable contact 131 from rebounding, but also ensure that the movable contact 131 can open and close smoothly without being locked.

Please refer to Figures 26 and 31. Alternatively, in an implementable manner of the embodiment of the present disclosure, the corner 1321 where the lug 132 contacts the friction boss 111 is arc-shaped. When the corner 1321 of the lug 132 comes into contact with the friction boss 111, it can slide smoothly to the surface of the friction boss 111, preventing violent shaking or blocking of the lug 132 due to the contact between the two.

Please refer to Figures 24 to 26. Alternatively, in an implementable manner of the embodiment of the present disclosure, the movable contact assembly 130 includes a support turntable 133 and a movable contact 131 fixedly connected to the support turntable 133. The support turntable 133 The movable contact 131 is driven to rotate so as to cooperate with the static contact 230 in the static contact structure to achieve closing or opening. The lug 132 is located on the supporting turntable 133 .

The support turntable 133 is rotatably disposed in the accommodation cavity 112 of the housing 210 , and the movable contact 131 is fixed on the support turntable 133 to rotate along with the support turntable 133 . In this embodiment, the lugs 132 are provided on the support turntable 133 , for example, the lugs 132 are provided on the side walls of the support turntable 133 (as shown in FIG. 24 ), or the lugs 132 are provided below the support turntable 133 . In some other embodiments, the lugs 132 can also be provided directly on the movable contact 131 or at other locations on the movable contact assembly 130 .

Please refer to Figures 22 to 25. Alternatively, in an implementable manner of the embodiment of the present disclosure, each of the movable contacts 131 and the static contacts 230 includes two, and the two static contacts 230 are respectively connected with the two movable contacts. The contact 131 cooperates, the lug 132 includes at least one, and the number of the friction bosses 111 is greater than or equal to the number of the lug 132 .

At this time, the number of matching groups of the movable contacts 131 and the static contacts 230 is two groups, and the two movable contacts 131 are respectively in contact with or separated from the two static contacts 230 at the same time. The number of lugs 132 may be one, two or more. The number of friction bosses 111 can also be one, two or more, but the number of friction bosses 111 should not be less than the number of lugs 132 to ensure that each lug 132 has a corresponding friction boss 111. It slows it down and fixes it.

Optionally, in an implementable manner of the embodiment of the present disclosure, the lugs 132 include two, and the friction boss 111 includes two groups, two lugs 132, two groups of friction bosses 111, and two movable contacts. 131 and the two static contacts 230 are respectively arranged symmetrically with respect to the rotation axis of the supporting turntable 133 . At this time, a better anti-rebound effect can be achieved without providing too many lugs 132 and friction bosses 111, and the symmetrical structure is easier to process.

It should be noted that in this embodiment, the friction boss 111 includes two groups, and the two groups of friction bosses 111 respectively correspond to the two groups of movable contacts 131 and stationary contacts 230 . A set of friction bosses 111 may include only one friction boss 111. At this time, the friction boss 111 is set at the opening position 420 for extruding and resisting the lug 132 so that the lug 132 stays on it; A set of friction bosses 111 may also include at least two friction bosses 111 , wherein one friction boss 111 is provided at the opening position 420 for pressing against the lug 132 so that the lug 132 stays there. , the remaining friction bosses 111 are arranged on the movement path of the lug 132 , which are deceleration bosses and are used to consume the energy of the moving contact assembly 130 . The lug 132 stays in the opening position 420 after passing over these friction bosses 111 .

Optionally, in an implementable manner of the embodiment of the present disclosure, the materials of the housing 210, the friction boss 111, the lugs 132 and the supporting turntable 133 are all made of plastic. Plastic can insulate the housing 210 and its interior to prevent electric shock due to the existence of the arc 500 . At the same time, the plastic can also be slightly deformed during the mutual extrusion of the lug 132 and the friction boss 111 to prevent the lug 132 from being damaged or stuck when the lug 132 contacts the friction boss 111 .

As shown in Figure 32, the embodiment of the present disclosure also discloses an isolation switch 300 (which may also be commonly referred to as a rotary switch), including a plurality of switch units 200 arranged in a stack, and an operating mechanism 310 connected to the switch unit 200. The mechanism 310 may be provided with an operating handle 320. Among them, the operating mechanism 310 can adopt the form of cascade transmission with the switch unit 200, that is, the operating mechanism 310 can be connected to the first switch unit 200, and each switch unit is connected in sequence; the operating mechanism 310 can also be connected with the other switch units 200. are connected through penetrating connecting shafts to establish the required connection relationship with each switch unit 200, and each switch unit 200 can be controlled to be on and off at the same time through the operating mechanism 310. This is not specifically limited in the embodiment of the present disclosure.

Using the above method, when the isolating switch 300 is used, the arc generated during opening can quickly enter the arc extinguishing chamber 240 or the arc extinguishing channel for arc extinguishing, and the burning degree at the on-off position of the moving contact can be reduced. It is beneficial to ensure the stability of the isolating switch 300 during use.

As another example shown in FIG. 32, FIG. 33, and FIG. 34, an embodiment of the present disclosure also provides an isolation switch 300, which may include a plurality of stacked switch units 200, an operating mechanism 310, and an operating mechanism 310 provided on the operating mechanism 310. The operating handle 320 and the switch unit 200 include a casing 210, any one of the above movable contact structures 100, a static contact 230 and an arc extinguishing chamber 240 arranged in the casing 210. The operating mechanism 310 communicates with multiple switch units 200 at the same time. The first movable contact bracket 140 and the second movable contact bracket 150 of the movable contact structure 100 are drivingly connected, and the static contact 230 is connected to the first movable contact 1311 and the second movable contact in the movable contact structure 100 1312, the arc extinguishing chamber 240 is located on the side of the static contact 230.

For example, the rotation direction of the movable contact structure 100 may be perpendicular to the rotation axis of the operating mechanism 310 . The plurality of switch units 200 are divided in two directions They are stacked, with one direction (A1 direction in FIG. 33) perpendicular to the rotation axis of the operating mechanism 310, and the other direction (A2 direction in FIG. 33) parallel to the rotation axis of the operating mechanism 310.

The isolation switch 300 includes the same structure and beneficial effects as the movable contact structure 100 in the previous embodiment. The structure and beneficial effects of the movable contact structure 100 have been described in detail in the foregoing embodiments and will not be described again here.

The embodiment of the present disclosure also discloses a power supply system, which may include: a DC source, a power conversion unit and an isolation switch 300. The isolation switch 300 is connected between the DC source and the power conversion unit, and operates when the DC source or the power conversion unit fails. The isolation switch 300 realizes opening. This will help ensure the stability of the power supply system during use. The above descriptions are only preferred embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and changes. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this disclosure shall be included in the protection scope of this disclosure.

Industrial applicability

Embodiments of the present disclosure provide a movable contact structure, a switch unit, an isolating switch and a power supply system. Through the support section and the connection sections provided at opposite ends of the support section, when the connection section is connected to the static contact, the movable contact structure An electrical connection can be formed with the static contacts. When the connection section and the static contact are separated, an arc will be generated at the connection between the connection section and the static contact. In order to prompt the generated arc to be introduced into the arc extinguishing chamber for arc extinguishing in time, the connection section is separated from the support section by An arc-starting slope is formed on one side, and the arc-starting slope extends outward from the side where the connecting section is cut by the static contact, so that the arc generated at the position where the connecting section is cut by the static contact is guided outward through the arc-starting slope to avoid arcing When local (on-off position) burning is serious, the arc can also be transferred to a position closer to the arc extinguishing chamber, which is conducive to the arc quickly entering the arc extinguishing chamber for arc extinguishing.

In addition, it can be understood that the movable contact structure, switch unit, isolation switch and power supply system provided by the embodiments of the present disclosure are reproducible and can be used in a variety of industrial applications. For example, the movable contact structure, switch unit, isolating switch and power supply system provided by the embodiments of the present disclosure can be used in the field of electrical appliance technology, such as the field involving a movable contact structure, switch unit, isolating switch and power supply system.

Claims

A movable contact structure (100), wherein the movable contact structure (100) includes a support section (110), and connection sections (120) provided at opposite ends of the support section (110), and the connection section The segment (120) is used to connect or disconnect with the static contact; the width of the side of the connecting segment (120) cut by the static contact is smaller than the width of the side of the connecting segment (120) facing away from the stationary contact. ; An arc-starting slope (122) is formed on one side of the connecting section (120) away from the supporting section (110).
The movable contact structure (100) according to claim 1, wherein the arc-starting slope (122) extends continuously outward from the side that cuts into the stationary contact.
The movable contact structure (100) according to claim 1, wherein the connecting section (120) includes a first contact piece (124) and a second contact piece (126) arranged oppositely, and the first contact piece (126) An accommodating space for inserting the static contact is formed between (124) and the second contact piece (126), and the arc starting slope (122) is respectively located on the first contact piece (124) and the second contact piece (126). On the second contact piece (126).
The movable contact structure (100) according to any one of claims 1 to 3, wherein the support section (110) is arranged in a straight line, and the plane where the arc-starting slope (122) is located is in contact with the support section (110). 110) The angle between the extension directions is 100° to 140°.
The moving contact structure (100) according to claim 3, wherein the lead-out position of the arc-starting bevel (122) is provided with an arc-starting fillet (129), and the lead-out position is located on the arc-starting bevel (122). ) and the connecting section (120) are away from the angle formed by cutting into the side of the static contact.
The moving contact structure (100) according to claim 5, wherein the access position of the arc-starting slope (122) is provided with an arc-generating fillet (128), and the access position is located on the arc-starting slope (122). (122) and the connecting section (120) at the angle formed by cutting into one side of the static contact.
The movable contact structure (100) according to claim 3, wherein the first contact piece (124) and the second contact piece (126) are arranged in parallel or at a preset angle; The sides of the piece (124) and the second contact piece (126) that cut into the static contact are respectively provided with flanges (127), and the two flanges (127) are folded toward the side away from each other. .
The moving contact structure (100) according to claim 6, wherein the arc-starting fillet (129) protrudes from the arc-starting slope (122).
The movable contact structure (100) according to claim 5 or 6, wherein the first contact piece (124) and the second contact piece (126) are respectively provided with bending portions (121) to The first contact piece (124) is formed with a first connecting plate (1242) and a first arc starting plate (1244) that are connected to each other, and the second contact piece (126) is formed with a second connecting plate that is connected to each other. (1262) and the second arc starting plate (1264); the first connecting plate (1242) is parallel to the second connecting plate (1262), and the first arc starting plate (1244) is parallel to the second arc starting plate (1262). Arc plate (1264) fit.
The movable contact structure (100) according to claim 3, wherein the first contact piece (124) and the second contact piece (126) are respectively provided with bending portions (121) so that the The first contact piece (124) is formed with a first connecting plate (1242) and a first arc starting plate (1244) that are connected to each other, and the second contact piece (126) is formed with a second connecting plate (1262) that is connected to each other. ) and the second arc starting plate (1264); the first connecting plate (1242) is parallel to the second connecting plate (1262), and the first arc starting plate (1244) and the second arc starting plate (1264) are parallel or have a preset angle, and the distance between the first connecting plate (1242) and the second connecting plate (1262) is greater than the distance between the first arc starting plate (1244) and the third connecting plate (1264). The distance between the two arc striking plates (1264).
The movable contact structure (100) according to claim 3, wherein the first contact piece (124) is provided with a bending portion (121), so that the first contact piece (124) forms an interconnected The first connecting plate (1242) and the first arc igniting plate (1244), the second contact plate (126) only includes a second connecting plate (1262) corresponding to the first connecting plate (1242); The first connecting plate (1242) and the first arc starting plate (1244) are respectively parallel to the second connecting plate (1262), and the first arc starting plate (1244) is located on the first connecting plate. Between the plane where (1242) is located and the plane where the second connecting plate (1262) is located.
The movable contact structure (100) according to any one of claims 1-3, wherein the movable contact structure (100) is integrally formed, or the movable contact structure (100) includes oppositely arranged The first body and the second body are connected to form the support section (110) and the connecting section (120).
The movable contact structure according to claim 1, wherein the movable contact structure further includes: a first movable contact bracket (140) and a second movable contact bracket (150) that are clamped to each other, and are clamped in sequence. The first spring piece (160), the first movable contact (1311), the second movable contact fixed between the first movable contact bracket (140) and the second movable contact bracket (150) The head (1312) and the second spring piece (170), an accommodation space (190) is formed between the first movable contact (1311) and the second movable contact (1312), and the accommodation space (190) is used to accommodate stationary contacts. The first spring piece (160) and the second spring piece (170) are in the first movable contact bracket (140) and the second movable contact bracket. Under the clamping effect of (150), the first movable contact (1311) and the second movable contact (1312) are respectively exerted a mutually approaching pressure.
The moving contact structure according to claim 13, wherein the first moving contact bracket (140) is provided with a hook (141), and the second moving contact bracket (150) is provided with a hook (141) to enable the The clamping hole (151) into which the hook (141) extends, the inner wall of the clamping hole (151) is provided with a clamping platform (152), and the hook (141) can hook the clamping platform (152) to enable The first movable contact bracket (140) and the second movable contact bracket (150) are snap-connected.
The moving contact structure according to claim 13, wherein the first moving contact bracket (140) is provided with a first through groove (143), The second movable contact holder (150) is provided with a second through groove (154) corresponding to the position of the first through groove (143). The first through groove (143) and the second through groove (143) are The slot (154) is used to accommodate the first spring piece (160), the first movable contact (1311), the second movable contact (1312) and the second spring piece (170).
The moving contact structure according to claim 13, wherein the first spring piece (160) includes a first support section (161) and a first urging section (161) disposed on the first support section (161). 162), the first support section (161) resists the first movable contact bracket (140), and the end of the first pressing section (162) extends toward the first movable contact (1311) And resists the first movable contact (1311);

The second spring piece (170) includes a second support section (171) and a second urging section (172) provided on the second support section (171). The second support section (171) is connected to the second spring piece (170). The second movable contact bracket (150) resists, and the end of the second pressing section (172) extends toward the second movable contact (1312) and resists the second movable contact (1312). .
The movable contact structure according to claim 16, wherein the first pressing section (162) resists a region of the first movable contact (1311) cut into the stationary contact, and the second The urging section (172) resists the area of the second movable contact (1312) that cuts into the stationary contact.
The movable contact structure according to claim 13, wherein an abutment boss (180) is provided on the surfaces of the first movable contact (1311) and/or the second movable contact (1312) that are close to each other. ), the first movable contact (1311) and the second movable contact (1312) resist each other through the contact boss (180) to form the accommodation space (190).
The moving contact structure according to claim 13, wherein a first limiting boss (1241) is provided on a surface of the first moving contact (1311) facing the first spring piece (160), and the The first spring piece (160) is provided with a first limiting hole (163) that cooperates with the first limiting boss (1241), and the first limiting boss (1241) is used to prevent the third A spring piece (160) rotates, and the first spring piece (160) can slide along the first limiting boss (1241) to approach or move away from the first spring piece (160);

The second movable contact (1312) is provided with a second limiting boss (1261) on a surface facing the second spring piece (170), and the second spring piece (170) is provided with a second limiting boss (1261). The second limiting hole is matched with two limiting bosses (1261). The second limiting boss (1261) is used to prevent the second spring piece (170) from rotating. The second spring piece (170) It can slide along the second limiting boss (1261) to approach or move away from the second spring piece (170).
The movable contact structure according to claim 19, wherein the lead-out position of the arc-starting bevel (122) is provided with an arc-starting fillet (129), and the lead-out position is between the arc-starting bevel (122) and the arc-starting bevel (122). The connecting section (120) is away from the angle formed by the side where the static contact cuts.
A switch unit (200), wherein the switch unit (200) includes a housing (210), and a rotating bracket (220) provided in the housing (210), and the rotating bracket (220) The movable contact structure (100) according to any one of claims 1-20 is provided; the housing (210) is also provided with a static contact corresponding to the movable contact structure (100). (230), and an arc extinguishing component corresponding to the static contact (230).
A switch unit (200), wherein the switch unit includes a housing (210) and a static contact assembly as a static contact structure disposed in the housing (210) and the static contact structure A matching movable contact assembly, the movable contact assembly includes a movable contact structure (100) and is provided with a lug (132), and the housing (210) is provided with a container for accommodating the movable contact assembly. A cavity (112) is provided with a friction boss (111) on the inner wall of the cavity (112). The moving contact assembly and the static contact structure are separated, and the lug (132) is connected to the The friction boss (111) presses and resists to make the lug (132) stay in the opening position (420).
The switch unit (200) according to claim 22, wherein the lug (132) rotates following the movable contact assembly to divide an arc-shaped space (400) within the housing (210), so The arc-shaped space (400) has an arc-breaking position (430) and a gate-opening position (420), and the friction boss (111) is located at the gate-opening position (420) of the arc-shaped space (400) and moves towards the opening position (420). The arc breaking position (430) is extended.
The switch unit (200) according to claim 23, wherein the surface of the friction boss (111) facing the lug (132) is inclined, and the inclined surface is close to one end of the arc breaking position (430) Lower than the end of the inclined surface away from the arc breaking position (430).
The switch unit (200) according to claim 24, wherein the friction boss (111) inclined surface includes a first inclined surface (1111) and a second inclined surface (1112) connected to each other, the first inclined surface (1111) Set close to the arc-breaking position (430), the second inclined plane (1112) is located at the opening position (420), and the inclination angle of the first inclined plane (1111) is greater than that of the second inclined plane (1112). Tilt angle.
The switch unit (200) according to claim 22, wherein the surface of the friction boss (111) facing the lug (132) is an arc surface, and the lug (132) crosses the arc surface. After the highest point, it is pressed against the arc surface.
The switch unit (200) according to claim 22, wherein the corner (1321) where the lug (132) contacts the friction boss (111) is arc-shaped.
The switch unit (200) according to claim 22, wherein the movable contact assembly includes a support turntable (133) and a movable contact (131) fixedly connected to the support turntable (133), the support turntable (133) is driven to rotate so that the movable contact (131) cooperates with the static contact (230) in the static contact structure to achieve closing or opening, and the lug (132) is located on the support On the turntable (133).
The switch unit (200) according to claim 28, wherein each of the movable contact (131) and the static contact (230) includes two, and the two static contacts (230) are respectively connected with two The movable contacts (131) cooperate with each other, and the lug (132) includes at least one, The number of friction bosses (111) is greater than or equal to the number of lugs (132).
The switch unit (200) according to claim 29, wherein the lugs (132) include two, the friction boss (111) includes two groups, two lugs (132), two groups The friction boss (111), the two movable contacts (131) and the two stationary contacts (230) are respectively arranged symmetrically with respect to the rotation axis of the support turntable (133).
An isolating switch (300), wherein the isolating switch (300) includes a plurality of switch units (200) according to any one of claims 21 to 30 arranged in a stack, and the switch unit (200) is 200) is connected to the operating mechanism (310), and the operating mechanism (310) is provided with an operating handle (320).
The isolating switch (300) according to claim 31, wherein the switch unit (200) includes a housing (210), and a switch according to any one of claims 1 to 20 provided in the housing (210). The movable contact structure, the static contact (230) and the arc extinguishing chamber (240), the operating mechanism (310) simultaneously communicates with the movable contact structures (100) in multiple switch units (200). The first movable contact bracket (140) and the second movable contact bracket (150) are drivingly connected, and the static contact (230) is connected to the first movable contact (1311) in the movable contact structure (100). Cooperating with the second movable contact (1312), the arc extinguishing chamber (240) is located on the side of the static contact (230).
A power supply system, wherein the power supply system includes: a DC source, a power conversion unit and an isolation switch (300) according to claim 31 or 32, the isolation switch (300) being connected between the DC source and the Between the power conversion units, when the DC source or the power conversion unit fails, opening is achieved by operating the isolation switch (300).