changeover switch

Abstract

The application discloses a change-over switch, which comprises a shell and a switch pole, the switch pole comprises a rotating shaft and two sets of contact mechanisms, in a first direction, the rotating shaft is rotatably arranged between the two sets of contact mechanisms, each set of contact mechanisms comprises a static contact group and a dynamic contact assembly, the static contact group comprises two static contacts which are arranged in a second direction, the dynamic contact assembly comprises a contact support and a dynamic contact, the dynamic contact comprises at least two dynamic contact bridges which are arranged side by side in a third direction, each dynamic contact bridge is arranged on the contact support in the second direction, and a dynamic contact point of each dynamic contact bridge is arranged opposite to a static contact point of the static contact in the first direction. In the application, the two adjacent dynamic contact bridges in the same dynamic contact assembly are arranged side by side in the third direction, so that the number of contact points between the dynamic contact assembly and the static contact group can be increased, the two adjacent dynamic contact bridges are prevented from being arranged in the moving direction of the dynamic contact assembly, the space occupied by the dynamic contact assembly in the shell is saved, and the size of the change-over switch is reduced.

Description

Technical Field

[0001] This invention relates to the field of low-voltage electrical appliances, and more specifically to a changeover switch. Background Technology

[0002] Changeover switches enable the switching of load lines between two power sources. They are widely used in various uninterrupted power supply applications to ensure power reliability. In existing products, changeover switches typically switch between primary and backup power sources by changing the opening and closing of two sets of contact mechanisms. However, the moving contact assembly in a changeover switch usually adopts a bridge-type moving contact bridge structure. When two or more moving contact bridges are set in the moving contact assembly to form double or more contacts, adjacent moving contact bridges in the same moving contact assembly are usually spaced apart along the moving direction of the moving contact assembly. This structure makes the moving contact assembly occupy a large space in its moving direction. In particular, when both sets of moving contact assemblies in the changeover switch are distributed along the moving direction of the moving contact, the size of the changeover switch is further increased, which is not conducive to meeting the requirements of miniaturization design. In addition, the opening and closing of the two sets of contact mechanisms are almost simultaneous. If it cannot be ensured that one set of contact mechanisms opens first, it is easy for both sets of contact mechanisms to close simultaneously, which is not conducive to ensuring the safe use of the changeover switch. Summary of the Invention

[0003] The purpose of this invention is to overcome at least one defect of the prior art and provide a changeover switch.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This invention provides a changeover switch, including a housing and a switch electrode disposed within the housing. The switch electrode includes a rotating shaft and two sets of contact mechanisms. In a first direction, the rotating shaft is rotatably mounted between the two sets of contact mechanisms. Each set of contact mechanisms includes a group of stationary contacts and a moving contact assembly spaced apart and opposite each other in the first direction. The group of stationary contacts includes two stationary contacts spaced apart in a second direction. The moving contact assembly includes a contact support and a moving contact. The contact support is driven by the rotating shaft to move linearly in the first direction. The moving contact includes at least two moving contact bridges. Two adjacent moving contact bridges are arranged side by side in a third direction. Each moving contact bridge is disposed on the contact support in the second direction, and the moving contact of each moving contact bridge is spaced apart and opposite to the stationary contact of the stationary contact in the first direction. The first direction, the second direction, and the third direction are perpendicular to each other.

[0006] Preferably, the contact support is provided with at least one partition, which separates two adjacent moving contact bridges in a third-order upward direction.

[0007] Preferably, the contact support is provided with a mounting cavity, and the moving contact bridge is disposed through the mounting cavity, so that the moving contact of each moving contact bridge is located outside the mounting cavity.

[0008] Preferably, the edge of the moving contact bridge is provided with a locking portion, and the locking portion supports locking and limiting the contact.

[0009] Preferably, the mounting cavity is provided with a partition, which divides the mounting cavity into at least two contact cavities along a third direction. Each contact cavity is provided with a moving contact bridge and a contact spring, and the contact spring is located on the side of the moving contact bridge that is opposite to the stationary contact.

[0010] Preferably, each contact can be connected to the same rotating shaft via a linkage, and the connection positions of the two linkages on the rotating shaft are not collinear with the axis of the rotating shaft.

[0011] Preferably, the rotating shaft includes a drive shaft, on which two coaxial rotating disks are mounted, and the two rotating disks are driven and cooperate with the drive shaft respectively. Each rotating disk is supported and connected to a contact via a linkage component.

[0012] Preferably, each contact support is further connected to the housing with a reset elastic element, which is located on the side of the contact support opposite to the rotating shaft.

[0013] Preferably, the drive shaft is provided with two opening push parts, each of which cooperates with a linkage component. When the drive shaft is rotated, one of the opening push parts first drives a linkage component to drive the connected rotating disk to open and rotate, and then the drive shaft drives the other rotating disk to close and rotate.

[0014] Preferably, the middle sidewall of the drive shaft protrudes outward to form a brake-opening push part, and the two ends of the drive shaft are respectively driven and connected to two rotating disks. One end of the linkage connected to each rotating disk is located on the rotation trajectory of the brake-opening push part.

[0015] Preferably, the drive shaft is provided with a drive section, and two brake-opening push sections are symmetrically distributed on both sides of the drive section along the circumferential direction of the drive shaft. The rotating disk is provided with a drive groove that cooperates with the drive section.

[0016] Preferably, each stationary contact includes at least one stationary contact plate, one end of which is arranged along a second direction and has a stationary contact point, the stationary contact point being spaced apart from the moving contact point at one end of each moving contact bridge in a first direction.

[0017] Preferably, each contact mechanism is also equipped with an arc extinguishing system, which includes an arc extinguishing chamber. In a first direction, the arc extinguishing chamber is arranged side by side with the corresponding contact mechanism, and the two arc extinguishing chambers are located on the same side of the two sets of contact mechanisms. In a second direction, the arc extinguishing chambers of the two arc extinguishing systems are arranged at intervals.

[0018] In the changeover switch of the present invention, two adjacent moving contact bridges in the same moving contact assembly are arranged side by side in a third direction. This can increase the number of contacts between the moving contact assembly and the stationary contact group, and avoid setting two adjacent moving contact bridges at intervals in the moving direction of the moving contact assembly, thus saving the space occupied by the moving contact assembly in the housing and reducing the size of the changeover switch.

[0019] In addition, adjacent moving contact bridges are separated by partitions to ensure safe use.

[0020] In addition, each moving contact bridge is snapped into the contact support via a snap-fit ​​part, which helps to ensure the assembly stability of the moving contact bridge and the contact support.

[0021] In addition, each moving contact bridge is equipped with a contact spring to ensure the contact pressure between each moving contact bridge and the stationary contact.

[0022] In addition, the rotating shaft of the changeover switch has a split structure, which is used to drive one set of contact mechanisms to open the circuit first, and the other set of contact mechanisms to open the circuit later, ensuring safe use. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the internal structure of the switching electrode in this invention;

[0024] Figure 2 This is a schematic diagram of the moving contact assembly in this invention;

[0025] Figure 3 This is a schematic diagram of the contact support structure in this invention;

[0026] Figure 4 This is a schematic diagram of the structure of the moving contact bridge of the present invention;

[0027] Figure 5 This is a schematic diagram of the cooperation between the rotating shaft and the contact mechanism in this invention;

[0028] Figure 6 This is a schematic diagram of the cooperation between the moving contact assembly and the rotating shaft in this invention;

[0029] Figure 7 A schematic diagram of the structure of the rotating shaft in this invention;

[0030] Figure 8 This is a schematic diagram of the drive shaft of the rotating shaft in this invention;

[0031] Figure 9 This is a cross-sectional view of the cooperation between the rotating disk and the drive shaft in this invention;

[0032] Figure label:

[0033] 1-Housing, 11-Limiting part, 2-Switch pole, 20-Terminal, 21-Rotating shaft, 211-Drive shaft, 2111-Drive part, 2112-Opening push part, 212-Rotating disk, 2120-Central hole, 2121-Drive slot, 2122-Closing part, 2123-Connecting part, 2124-Connecting hole, 2125-Stop part, 22-Moving contact assembly, 221-Contact support, 2 210-Mounting cavity, 2211-Hinged part, 2212-Matching part, 2213-Partition plate, 2214-Plug-in part, 2215-Baffle plate, 222-Moving contact, 2220-Moving contact bridge, 2221-Moving contact point, 2222-Snap-fit ​​part, 223-Contact spring, 23-Stationary contact, 231-Stationary contact plate, 232-Stationary contact point, 24-Linkage component, 25-Reset elastic component, 28-Arc extinguishing chamber. Detailed Implementation

[0034] The following embodiments, in conjunction with the accompanying drawings, further illustrate specific implementations of the changeover switch of the present invention. The changeover switch of the present invention is not limited to the descriptions in the following embodiments.

[0035] The changeover switch includes a housing 1, and at least one switch pole 2 is provided inside the housing 1. When there are two or more switch poles 2 inside the housing 1, two adjacent switch poles 2 are arranged side by side. Each switch pole 2 includes at least three terminals 20, two sets of contact mechanisms, and a rotating shaft 21. The three terminals 20 are divided into at least two inlet terminals and at least one outlet terminal. The inlet terminals and outlet terminals are spaced apart at opposite ends of the housing 1. Each terminal 20 is opposite to the wiring port opened on the housing 1 and is used to connect to an external power supply. Each set of contact mechanisms is connected between one inlet terminal and one outlet terminal. That is, one set of contact mechanisms in the switch pole 2 is connected to the main power supply through the terminal 20 connected to it, and the other set of contact mechanisms is connected to the backup power supply through the terminal 20 connected to it.

[0036] Specifically, the two sets of contact mechanisms in each switch pole 2 are spaced apart and opposite each other inside the housing 1. Each set of contact mechanisms is connected between an incoming terminal and an outgoing terminal. A rotating shaft 21 is located between the two sets of contact mechanisms. Driving the rotating shaft 21 to rotate drives the two contact mechanisms in the same switch pole 2 to open and close. When the rotating shaft 21 drives one set of contact mechanisms to close, it drives the other set of contact mechanisms to open. The opening and closing of one set of contact mechanisms is used to control the disconnection and connection of the main power supply, and the opening and closing of the other set of contact mechanisms is used to control the disconnection and connection of the backup power supply. The main power supply and the backup power supply are not connected at the same time, that is, the two sets of contact mechanisms will not close at the same time.

[0037] Each contact mechanism includes a moving contact assembly 22 and a stationary contact group spaced apart. The moving contact assembly 22 includes a contact support 221 and a moving contact 222 disposed on the contact support 221. Moving contacts 222 are respectively provided at both ends of the moving contact 222. The stationary contact group includes two stationary contacts spaced apart. Each stationary contact is provided with a stationary contact 232. The contact support 221 is driven by the rotating shaft 21 to drive the moving contact assembly 22 to move in a straight line, so that the moving contacts 2221 and the stationary contacts 232 in the same contact mechanism come into contact or separate, thereby connecting or disconnecting a group of contact mechanisms.

[0038] For ease of description, the direction of movement of the moving contact assembly 22 is taken as the first direction, that is... Figure 1 The vertical direction is the first direction. Two sets of contact mechanisms are spaced apart in this first direction. The two directions perpendicular to the first direction are the second and third directions. The incoming and outgoing terminals are spaced apart and opposite each other in the second direction. Figure 1 The left and right directions are the second direction, and the third direction is perpendicular to both the first and second directions. Figure 1 In the middle, the third direction is the direction perpendicular to the paper, and two adjacent switch poles 2 are stacked in the third direction.

[0039] like Figure 2 As shown, the improvement of this application lies in that the moving contact 222 includes at least two moving contact bridges 2220. Two adjacent moving contact bridges 2220 are arranged side by side in a third direction. Each moving contact bridge 2220 is arranged on the contact support 221 along a second direction, and the moving contact point 2221 of each moving contact bridge 2220 is spaced apart from the stationary contact point 232 of the stationary contact in a first direction. That is, the length direction of the moving contact bridge 2220 is arranged along the second direction, and the width direction is arranged along a third direction.

[0040] In this way, two adjacent moving contact bridges 2220 in the same moving contact assembly 22 are arranged side by side in the third direction, which can increase the number of contacts of the moving contact assembly 22 and avoid the moving contact bridges 2220 being arranged at intervals along the moving direction of the moving contact assembly 22, thus saving the space occupied by the moving contact assembly 22 in the housing 1 and helping to reduce the size of the changeover switch.

[0041] Specifically, the contact support 221 is provided with a mounting cavity 2210, and each movable contact bridge 2220 is disposed through the mounting cavity 2210, so that the movable contact 2221 of each movable contact bridge 2220 is located outside the mounting cavity 2210. Preferably, a snap-fit ​​part 2222 is provided on the edge of the movable contact bridge 2220. When the movable contact bridge 2220 is disposed through the mounting cavity 2210, the snap-fit ​​part 2222 can snap-fit ​​and limit the contact support 221, thereby ensuring the assembly stability of the movable contact bridge 2220 and the contact support 221.

[0042] Preferably, the contact support 221 is provided with at least one partition 2213. The partition 2213 is used to separate two adjacent moving contact bridges 2220 in the third direction, ensuring that each moving contact bridge 2220 is in contact with the stationary contact, thus ensuring safety in use. Furthermore, the partition 2213 can divide the mounting cavity 2210 on the contact support 221 into at least two contact cavities arranged side by side in the third direction. A moving contact bridge 2220 is assembled in each contact cavity. A contact spring 223 is also connected between each moving contact bridge 2220 and the mounting cavity 2210. The contact spring 223 is connected to the side of the moving contact bridge 2220 facing away from the stationary contact. When a relative displacement occurs between the moving contact bridge 2220 and the contact support 221 in the first direction, the contact spring 223 is compressed and deformed. When closing, each contact spring 223 provides contact pressure to its corresponding moving contact bridge 2220.

[0043] A rotating shaft 21 is rotatably mounted between the two sets of contact mechanisms. The rotating shaft 21 drives the moving contact assemblies 22 in the two sets of contact mechanisms to move along a first direction. There can be two rotating shafts 21, i.e., two rotating shafts 21 are linked together, and each rotating shaft 21 drives one moving contact assembly 22 to move along the first direction. Preferably, the two sets of contact mechanisms are driven by the same rotating shaft 21, which reduces the number of rotating shafts 21, saves internal space, and lowers costs. Preferably, the rotating shaft 21 adopts a split structure. Rotating the rotating shaft 21 drives one set of contact mechanisms to open first, and the other set of contact mechanisms to close later, thereby avoiding simultaneous closing of both sets of contact mechanisms and ensuring operational safety.

[0044] Combination Figure 1-4 A specific embodiment of a changeover switch is provided.

[0045] like Figure 1 As shown, the changeover switch includes a housing 1, within which at least one switch pole 2 is disposed. Each switch pole 2 is provided with a terminal 20, which is divided into an input terminal and an output terminal. The input terminal and the output terminal are spaced apart and opposite each other in a second direction. Typically, the input terminal and the output terminal are arranged in pairs. Each switch pole 2 includes two sets of contact mechanisms spaced apart in a first direction. A rotating shaft 21 is rotatably disposed between the two sets of contact mechanisms. Each set of contact mechanisms includes a moving contact assembly 22 and a stationary contact assembly spaced apart and opposite each other in the first direction. The moving contact assembly 22 is linked to the rotating shaft 21 through a linkage 24. The rotating shaft 21 drives the moving contact assembly 22 to move along the first direction to cooperate with the stationary contact assembly. In this embodiment, both sets of moving contact assemblies 22 are simultaneously driven by the rotating shaft 21 to move along the first direction, but the two sets of contact mechanisms cannot be connected at the same time. That is, one set of moving contact assemblies 22 is in contact with one set of stationary contact assemblies, while the other set of moving contact assemblies 22 is separated from the other set of stationary contact assemblies.

[0046] Specifically, the moving contact assembly 22 includes a contact support 221, which is linked to the rotating shaft 21 via a linkage 24. The hinge points of the two linkages 24 and the rotating shaft 21, as well as the axis of the rotating shaft 21, are not collinear. The middle of the contact support 221 is provided with a mounting cavity 2210, in which a moving contact 222 is disposed through. Both ends of the moving contact 222 are provided with moving contact portions and extend beyond the mounting cavity 2210. The stationary contact assembly includes two stationary contacts spaced apart in a second direction. Each stationary contact is provided with a stationary contact portion spaced apart from the moving contact portion. When the rotating shaft 21 drives the two moving contact assemblies 22 to move, in the same contact mechanism, the two moving contact portions of the moving contact 222 respectively contact or separate from the stationary contact portions of the two stationary contacts.

[0047] In this embodiment, each moving contact 222 includes at least two moving contact bridges 2220. Two adjacent moving contact bridges 2220 are arranged side by side in a third direction. Each moving contact bridge 2220 is disposed through the mounting cavity 2210 in a second direction. Each moving contact bridge 2220 has a moving contact point 2221 at each end. The same end of all moving contact bridges 2220 on the same contact support 221 forms the moving contact portion of the moving contact 222. At this time, each moving contact portion has at least two moving contact points 2221. The stationary contact portion of the stationary contact is provided with a stationary contact 232 that cooperates with the moving contact 2221. The number of stationary contacts 232 can be one or correspond to the number of moving contacts 2221. The moving contacts 2221 and the stationary contacts 232 are spaced apart and opposite each other in the first direction. This structure increases the number of contacts between the moving contact assembly 22 and the stationary contact group, avoids the need to space two adjacent moving contact bridges 2220 in the moving direction of the moving contact assembly 22, and saves the space occupied by the moving contact assembly 22 in the housing 1.

[0048] In this embodiment, as Figure 2-4 As shown, each contact support 221 has two moving contact bridges 2220 arranged side-by-side within its mounting cavity 2210. A partition 2213 is provided within the mounting cavity 2210, dividing it into two parallel contact cavities in a third-order direction. Each contact cavity contains one moving contact bridge 2220, which extends through the cavity, allowing the two moving contacts 2221 of each bridge to extend outside. Adjacent moving contact bridges 2220 are separated by the partition 2213, ensuring safety during use. Preferably, a locking structure is provided between the contact support 221 and the moving contact bridge 2220. Figure 4In this design, a snap-fit ​​portion 2222 is provided on the edge of the movable contact bridge 2220, so that the movable contact bridge 2220 is snapped and limited by the snap-fit ​​portion 2222, thereby restricting the relative movement of the movable contact bridge 2220 and the contact support 221 in the second direction, and ensuring the assembly stability of the movable contact bridge 2220 and the contact support 221.

[0049] Furthermore, each contact cavity is equipped with a contact spring 223. Each contact spring 223 is located on the side of the moving contact bridge 2220 facing away from the stationary contact, ensuring the contact pressure between each moving contact bridge 2220 and the stationary contact. In the figure, each contact spring 223 is a spring segment.

[0050] Combination Figure 1-4 A moving contact assembly 22 is provided for use in this embodiment.

[0051] like Figure 2 , 3 As shown, the contact support 221 includes a block-shaped support body. A through groove serving as a mounting cavity 2210 is provided in the middle of the support body. A partition 2213 is provided inside the mounting cavity 2210, which divides the mounting cavity 2210 into two relatively independent contact cavities. One end of the support body is provided with a hinge portion 2211. A drive hole for hinged connection with the linkage member 24 is provided in the middle of the hinge portion 2211. The other end of the support body is provided with a pair of spaced baffles 2215. The support body between the pair of baffles 2215 is provided with a protruding insertion portion 2214. A reset elastic member 25 can be connected to the insertion portion 2214. The linkage member 24 and the reset elastic member 25 connected to the same contact support 221 form a set of drive components connected to the moving contact assembly 22.

[0052] like Figure 2 , 4 As shown, each movable contact bridge 2220 includes a strip-shaped contact bridge body. A movable contact 2221 is provided at each end of the contact bridge body, and the movable contact 2221 is located on the same side plate surface of the contact bridge body. Each contact spring 223 is connected to the middle of the contact bridge body. Each movable contact bridge 2220 has a snap-fit ​​portion 2222 protruding outward from its edge. Preferably, the snap-fit ​​portions 2222 are arranged in pairs on the same side of the movable contact bridge 2220. That is, the two snap-fit ​​portions 2222 on the same side are spaced apart in the second direction, and there is a gap between the two snap-fit ​​portions 2222 in the second direction, so that each snap-fit ​​portion 2222 is used to snap-fit ​​with the edge of the contact support 221.

[0053] In this embodiment, the stationary contact can employ existing technology. Typically, the stationary contact includes a stationary contact plate 231. Preferably, the stationary contact plate 231 is disposed along the corner of the housing 1, thereby reducing the space occupied by the stationary contact plate 231. Figure 1In this embodiment, one end of the stationary contact plate 231 is arranged along the second direction, and two stationary contacts 232 are arranged side by side in the third direction. Each stationary contact 232 is spaced apart from a moving contact 2221 in the first direction. The middle part of the stationary contact plate 231 can be bent and extended so that the other end of the stationary contact plate 231 moves closer to the adjacent terminal 20. In this embodiment, the two sets of contact mechanisms share a single output terminal. That is, one stationary contact in each of the two sets of contact mechanisms is connected to two different input terminals, and the other stationary contact in each of the two sets of contact mechanisms is connected to the same output terminal.

[0054] In this embodiment, the rotating shaft 21 is rotatably disposed between two sets of contact mechanisms. The axis of rotation of the rotating shaft 21 is parallel to a third direction. The rotating shaft 21 is connected to the hinge portion 2211 of a contact support 221 via a linkage 24. The rotating shaft 21 can be a one-piece structure. Of course, in this embodiment, it is preferred that the rotating shaft 21 adopts a split structure, such as... Figure 6 As shown, the rotating shaft 21 includes a drive shaft 211 that can be driven to rotate. Two rotating disks 212 are coaxially mounted on the drive shaft 211. Each rotating disk 212 is driven to rotate by the drive shaft 211, and the two rotating disks 212 can also be driven to drive each other. Each rotating disk 212 is connected to a moving contact assembly 22 through a linkage 24.

[0055] Furthermore, each contact support 221 is also connected to a reset elastic element 25. Figure 1 , 2 In the middle, the reset elastic element 25 is elastically connected between the plug portion 2214 of the contact support 221 and the outer shell 1. The reset elastic element 25 and the linkage element 24 connected on the same contact support 221 together form a set of driving components. The rotating shaft 21 realizes that one set of contact mechanisms opens first and the other set of contact mechanisms closes later through the two sets of driving components.

[0056] Combination Figure 5-9 A split-type rotating shaft 21 structure is provided for application in this embodiment.

[0057] like Figure 5 , 7As shown in Figure 9, the rotating shaft 21 includes a drive shaft 211, on which two rotating disks 212 are coaxially mounted. Each rotating disk 212 is driven by the drive shaft 211. Each rotating disk 212 is connected to the contact support 221 of the moving contact assembly 22 via a linkage 24. When the rotating shaft 21 rotates, the rotation of the drive shaft 211 drives one rotating disk 212 to rotate in the opening direction and the other rotating disk 212 to rotate in the closing direction. Two opening push parts 2112 are provided in the middle of the drive shaft 211. Each opening push part 2112 cooperates with two linkages 24. When the drive shaft 211 rotates, the opening push part 2112 first pushes one linkage 24, which drives one rotating disk 212 to rotate in the opening direction. Subsequently, the drive shaft 211 drives the other rotating disk 212 to rotate in the closing direction, thereby realizing that one of the two sets of contact mechanisms opens first and the other closes later.

[0058] like Figure 5 , 7 As shown in Figure 8, the tripping push part 2112 protrudes from the middle side wall of the drive shaft 211. Each rotating disk 212 is respectively assembled at both ends of the drive shaft 211. One end of the linkage 24 connected to each rotating disk 212 is located on the rotation trajectory of the tripping push part 2112. Specifically, one end of the linkage 24 passes through the connection hole 2124 of one rotating disk 212, and one end of the linkage 24 can slide within the connection hole 2124 of the rotating disk 212. The other end of the linkage 24 is linked to the moving contact assembly 22. The structure of the rotating shaft 21, the moving contact assembly 22 and the linkage 24 is simple, the cooperation stability is strong, and the cost is low.

[0059] The drive shaft 211 is provided with a drive part 2111, and two opening push parts 2112 are symmetrically distributed on both sides of the drive part 2111 along the circumferential direction of the drive shaft 211. The rotating disk 212 is provided with a drive groove 2121. The drive part 2111 cooperates with the drive groove 2121 to drive the rotating disk 212 to rotate in the closing direction or the opening direction. It has the advantages of simple structure and reliable cooperation.

[0060] Preferably, a partition 2110 is formed by protruding outward from the middle sidewall of the drive shaft 211. Both ends of the drive shaft 211 are respectively driven and connected to two rotating disks 212. One end of the linkage 24 connected to each rotating disk 212 is located on the rotation trajectory of the opening push part 2112. The two rotating disks 212 are separated by the partition 2110, which can prevent the two rotating disks 212 from interfering with each other during rotation.

[0061] Specifically, such as Figure 7-9As shown, the drive shaft 211 is cylindrical in shape. A strip-shaped boss protrudes from the circumferential sidewall of the drive shaft 211. A disc-shaped partition 2110 protrudes radially from the middle of the drive shaft 211. The partition 2110 makes the drive shaft 211 a stepped shaft that is thicker in the middle and thinner at both ends. The partition 2110 divides the strip-shaped boss into two drive sections 2111. Figure 7-9 In this configuration, the protrusion height of the strip-shaped boss is less than the protrusion height of the partition 2110; that is, the protrusion height of each drive part 2111 is less than the protrusion height of the partition 2110. Two bosses, serving as tripping push parts 2112, protrude outwards from the two sides of the partition 2110, and the two tripping push parts 2112 are symmetrically distributed on both sides of the strip-shaped boss along the circumferential direction of the partition 2110. Figure 7-9 In the circuit, each tripping push unit 2112 includes a straight sidewall and an arc-shaped wall. The straight sidewall of each tripping push unit 2112 faces one end of the linkage member 24 and drives the linkage member 24 by the straight sidewall of the tripping push unit 2112. The arc-shaped wall of each tripping push unit 2112 faces the drive unit 2111.

[0062] like Figure 6 , 7 As shown in Figure 9, each rotating disk 212 is generally circular. A central hole 2120 penetrating both sides is formed in the middle of the end face of the rotating disk 212. The two ends of the drive shaft 211 pass through the central holes 2120 of the two rotating disks 212 respectively. Of course, the central holes 2120 of the rotating disk 212 may not penetrate the rotating disk 212, in which case one end of the drive shaft 211 is inserted into the central hole 2120. An arc groove is also formed on the end face of the rotating disk 212. This arc groove serves as the drive groove 2121. In this embodiment, the drive groove 2121 is located on one side of the hole wall of the central hole 2120, so that the side with the smaller diameter of the drive groove 2121 is connected to the central hole 2120, so that the drive groove 2121 and the central hole 2120 are connected. 0 and the rotating disk 212 are concentric. The opposite ends of the drive groove 2121 serve as the closing part 2122 and the stop part 2125, respectively. One drive part 2111 on the drive shaft 211 is located in the drive groove 2121. The drive part 2111 cooperates with the closing part 2122 to drive the rotating disk 212 to perform closing rotation. In addition, the central angle of the drive part 2111 is smaller than the central angle of the drive groove 2121. That is, when the drive part 2111 abuts with the closing part 2122, there is a gap between the drive part 2111 and the stop part 2125 to ensure that when the drive part 2111 cooperates with one closing part 2122 to rotate, there is sufficient free travel between the drive part 2111 and the other stop part 2125.

[0063] The circumferential sidewall of the rotating disk 212 protrudes outward to form a connecting part 2123. The connecting part 2123 is located on the side away from the drive groove 2121 and is located closer to the stop part 2125. The connecting part 2123 has a strip-shaped connecting hole 2124. The through direction of the strip-shaped hole is parallel to the through direction of the central hole 2120. One end of the linkage 24 passes through the connecting hole 2124 and can slide in the connecting hole 2124. When the two rotating disks 212 are assembled on the drive shaft 211, the two connecting parts 2123 correspond to the two opening push parts 2112. In this embodiment, the two connecting parts 2123 are located between the straight sidewalls of the two opening push parts 2112.

[0064] The linkage 24 that mates with the rotating shaft 21 is preferably a U-shaped rod, with one end of the linkage 24 slidably inserted into the connecting hole 2124, such as... Figure 6 As shown, one end of the linkage 24 located in the connection hole 2124 extends to the moving trajectory of the tripping push part 2112, and the other end is connected to the moving contact assembly 22. That is, the other end of the linkage 24 passes through the drive hole of the contact support 221.

[0065] Combination Figure 5 Briefly describe the process of the rotating shaft 21 cooperating with the two sets of contact mechanisms.

[0066] exist Figure 5 In the first contact mechanism, the upper contact mechanism is the first contact mechanism, and the lower contact mechanism is the second contact mechanism. The moving contact assembly 22 in the first contact mechanism is connected to the first linkage member, and the moving contact assembly 22 in the second contact mechanism is connected to the second linkage member. The two rotating disks 212 of the rotating shaft 21 are divided into the first rotating disk and the second rotating disk according to the first linkage member and the second linkage member connected to them. The tripping push part 2112 that cooperates with the first linkage member is the first tripping push part, and the tripping push part 2112 that cooperates with the second linkage member is the second tripping push part.

[0067] like Figure 5In this circuit, when the drive shaft 211 rotates to switch the state of the two sets of contact mechanisms, a gap is left between the drive unit 2111 and the stop part 2125 of the second rotating disk. When the drive shaft 211 rotates, the straight side wall of the second opening push unit pushes one end of the second linkage member. As a result, the second rotating disk rotates in the opening direction under the joint cooperation of the second opening push unit and the drive unit 2111, thereby driving the moving contact assembly 22 in the second contact mechanism to move in the opening direction. At the same time, when the drive unit 2111 cooperates with the stop part 2125 of the second rotating disk, the drive unit 2111 has moved a certain distance in the drive groove 2121 of the first rotating disk and then cooperates with the closing part 2122 of the first rotating disk, thereby pushing the first rotating disk to rotate in the closing direction. The first rotating disk rotating in the closing direction drives the moving contact assembly 22 of the first contact mechanism to move in the closing direction through the first linkage member, thereby realizing that the second contact mechanism opens first and the first contact mechanism closes later.

[0068] Subsequently, when the drive shaft 211 rotates again to switch the state of the two sets of contact mechanisms, a gap is left between the drive unit 2111 and the stop part 2125 of the first rotating disk. When the drive shaft 211 rotates, the straight side wall of the first opening push unit pushes one end of the first linkage member. As a result, the first rotating disk rotates in the opening direction under the joint cooperation of the first opening push unit and the drive unit 2111, thereby driving the moving contact assembly 22 in the first contact mechanism to move in the opening direction. At the same time, when the drive unit 2111 cooperates with the stop part 2125 of the first rotating disk, the drive unit 2111 has moved a certain distance in the drive groove 2121 of the second rotating disk and then cooperates with the closing part 2122 of the second rotating disk, thereby driving the second rotating disk to rotate in the closing direction. The closing rotating second rotating disk drives the moving contact assembly 22 of the second contact mechanism to move in the closing direction through the second linkage member, thereby realizing that the first contact mechanism opens first and the second contact mechanism closes later.

[0069] Preferably, a limiting part 11 is also provided inside the outer casing 1. Figure 1 The middle limiting part 11 is an arc-shaped boss. The limiting part 11 is arranged around the side of the rotating shaft 21 opposite to the connecting part 2123. When the rotating shaft 21 is rotated, each connecting part 2123 can cooperate with the limiting part 11 to stop, so that the limiting part can be stopped when the rotating disk 212 rotates to the open position.

[0070] In addition, the switch pole 2 is also equipped with an arc extinguishing system that cooperates with each contact mechanism. Preferably, the arc extinguishing system includes an arc extinguishing chamber 28. In the first direction, each arc extinguishing chamber 28 is arranged side by side with the corresponding contact mechanism, and the two arc extinguishing chambers 28 are located on the same side of the two contact mechanisms. The moving contact portion of each moving contact 222 is in contact with or separates from the stationary contact at the arc inlet of an arc extinguishing chamber 28, thereby facilitating the introduction of the arc into the arc extinguishing chamber 28. In the second direction, the arc extinguishing chambers 28 in the two arc extinguishing systems are arranged at intervals. By reducing the number of arc extinguishing chambers used, it is beneficial to save internal space and reduce costs.

[0071] In this embodiment, a control electrode can also be configured inside the housing 1. The control electrode and the switch electrode 2 are preferably arranged side by side in the third direction. The control electrode adopts the prior art, that is, the control electrode includes a circuit board, a motor and a gear set. The circuit board is equipped with a controller. The motor is connected to the circuit board and starts and stops according to the control signal output by the controller. The gear set is connected between the output shaft of the motor and the rotating shaft 21 to realize the automatic opening and closing of the switch electrode 2 driven by the control electrode.

[0072] It should be noted that in the description of this invention, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship conventionally placed during use. They are used only for ease of description and do not indicate that the device or element referred to must have a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating relative importance.

[0073] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A changeover switch, comprising a housing (1) and a switch electrode (2) disposed within the housing (1), the switch electrode (2) comprising a rotating shaft (21) and two sets of contact mechanisms, wherein the rotating shaft (21) is rotatably mounted between the two sets of contact mechanisms in a first direction, each set of contact mechanisms comprising a stationary contact group and a moving contact assembly (22) spaced apart and opposite to each other in the first direction, the stationary contact group comprising two stationary contacts spaced apart in a second direction, the moving contact assembly (22) comprising a contact support (221) and a moving contact (222), the contact support (221) being driven by the rotating shaft (21) to move linearly along the first direction, characterized in that: The moving contact (222) includes at least two moving contact bridges (2220), two adjacent moving contact bridges (2220) are arranged side by side in a third direction, each moving contact bridge (2220) is arranged on the contact support (221) along a second direction, and the moving contact point (2221) of each moving contact bridge (2220) and the stationary contact point (232) of the stationary contact are spaced apart and opposite in a first direction, and the first direction, the second direction and the third direction are perpendicular to each other.

2. The changeover switch according to claim 1, characterized in that: The contact support (221) is provided with at least one partition (2213) that separates two adjacent moving contact bridges (2220) in a third-order upward direction.

3. The changeover switch according to claim 1 or 2, characterized in that: The contact support (221) is provided with a mounting cavity (2210), and the moving contact bridge (2220) is disposed through the mounting cavity (2210), so that the moving contact (2221) of each moving contact bridge (2220) is located outside the mounting cavity (2210).

4. The changeover switch according to claim 3, characterized in that: The edge of the moving contact bridge (2220) is provided with a snap-fit ​​part (2222), which snaps and limits the contact support (221).

5. The changeover switch according to claim 3, characterized in that: The mounting cavity (2210) is provided with a partition (2213), which divides the mounting cavity (2210) into at least two contact cavities along a third direction. Each contact cavity is provided with a moving contact bridge (2220) and a contact spring (223), and the contact spring (223) is located on the side of the moving contact bridge (2220) that is away from the stationary contact.

6. The changeover switch according to claim 1, characterized in that: Each contact support (221) is connected to the same rotating shaft (21) through a linkage (24), and the connection positions of the two linkages (24) on the rotating shaft (21) are not collinear with the axis of the rotating shaft (21).

7. The changeover switch according to claim 6, characterized in that: The rotating shaft (21) includes a drive shaft (211), on which two coaxial rotating disks (212) are mounted, and the two rotating disks (212) are driven and cooperated with the drive shaft (211) respectively. Each rotating disk (212) is connected to the contact support (221) through a linkage (24).

8. The changeover switch according to claim 7, characterized in that: Each contact support (221) is also connected to the housing (1) by a reset elastic element (25), which is located on the side of the contact support (221) facing away from the rotating shaft (21).

9. The changeover switch according to claim 7 or 8, characterized in that: The drive shaft (211) is provided with two tripping push parts (2112). Each tripping push part (2112) is connected to a linkage (24). When the drive shaft (211) is rotated, one of the tripping push parts (2112) first drives a linkage (24) to drive the connected rotating disk (212) to trip, and then the drive shaft (211) drives the other rotating disk (212) to close.

10. The changeover switch according to claim 9, characterized in that: The middle sidewall of the drive shaft (211) protrudes outward to form a tripping push part (2112). The two ends of the drive shaft (211) are respectively driven and connected to two rotating disks (212). One end of the linkage (24) connected to each rotating disk (212) is located on the rotation trajectory of the tripping push part (2112).

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