Contact system and circuit breaker

Abstract

The contact system comprises a button piece, a handle mechanism, a moving contact mechanism and a static contact which are arranged in a linear movement mode, the handle mechanism comprises a handle piece arranged in a rotating mode, a first connecting rod is arranged between the button piece and the handle piece, and the button piece drives the moving contact and the static contact of the contact mechanism to be in contact and separated through the handle piece. The moving contact mechanism is provided with an elastic mechanism, the handle piece is provided with a second sliding groove, the first connecting rod is provided with a second sliding part inserted into the second sliding groove, the second sliding groove is provided with a second closing end and a second opening end which are oppositely arranged, and when the elastic mechanism releases energy and drives the moving contact to be away from the static contact, the second sliding part is inserted into the second sliding groove. The second opening end of the second sliding groove slides in the direction away from the second sliding part, so that the handle piece is prevented from blocking the second sliding part when the moving contact is away from the static contact, the button piece does not need to completely move to the opening position, and the opening action is started before the button piece moves in place. And the opening process is realized under the driving of the elastic mechanism of the moving contact mechanism.

Description

Technical Field

[0001] This invention relates to the field of low-voltage electrical appliances, specifically to a contact system and a circuit breaker. Background Technology

[0002] As an important protective device in the field of low-voltage power transmission and distribution, the main performance of low-voltage circuit breakers—breaking capacity, temperature rise, electrical life, etc.—is closely related to the performance of internal moving and stationary contacts and their contact state.

[0003] In existing circuit breakers under load, during the process of closing to effective contact and during the process of opening to the maximum distance between the moving and stationary contacts, electric arcs are generated between the moving and stationary contacts, burning them and reducing the service life of the product. The larger the load current or the slower the moving contact moves, the more severe the burning and the shorter the service life of the product. For multi-pole circuit breakers, there is also the danger of phase line load imbalance caused by severe burning of a certain pole contact group, resulting in the equipment operating with a single phase. Summary of the Invention

[0004] The purpose of this invention is to overcome at least one defect of the prior art and provide a contact system.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A contact system includes a button component, a handle mechanism, a moving contact mechanism, and a stationary contact, all arranged linearly. The handle mechanism includes a rotatable handle. A first link connects the button component and the handle component. The handle component is connected to the moving contact mechanism via a second link. The button component, through the handle component, drives the moving contact of the contact mechanism to contact and separate from the stationary contact.

[0007] The moving contact mechanism has an elastic mechanism. The handle is provided with a second sliding groove. The first connecting rod is provided with a second sliding part that inserts into the second sliding groove. The second sliding groove has a second closing end and a second opening end that are disposed opposite to each other. The second sliding part can slide along the second sliding groove between the second closing end and the second opening end. When the second sliding part pushes the second closing end to rotate the handle, it causes the moving contact to contact the stationary contact through the second connecting rod. When the second sliding part pushes the second opening end to rotate the handle, it causes the moving contact to separate from the stationary contact through the second connecting rod.

[0008] The button can drive the second sliding part of the first link to push the second opening end, causing the handle to drive the second link to rotate towards the critical position. At the same time, it stores energy for the elastic mechanism of the moving contact mechanism. When the second link passes the critical position, it releases the elastic mechanism, causing the elastic mechanism to release energy and drive the moving contact away from the stationary contact. Simultaneously, it causes the second opening end of the second slide groove to slide away from the second sliding part, preventing the handle from blocking the second sliding part when the moving contact moves away from the stationary contact.

[0009] Preferably, the button is provided with a first sliding groove, the first sliding groove having a first closing end and a first opening end disposed opposite to each other, the first connecting rod is provided with a first sliding part for inserting into the first sliding groove, the first sliding part being able to slide along the first sliding groove between the first closing end and the first opening end, the first closing end being disposed on the side of the first sliding part away from the handle, when the button drives the first closing end to push the first sliding part, it is used to drive the contact mechanism to contact the stationary contact, when the button drives the first opening end to push the first sliding part, it is used to drive the moving contact mechanism to separate from the stationary contact;

[0010] When the moving contact moves away from the stationary contact, the elastic mechanism drives the handle to rotate and drives the second closing end of the second slide groove to push the second sliding part of the first link, so that the first sliding part of the first link slides away from the second closing end along the first slide groove, preventing the button from blocking the first sliding part when the moving contact moves away from the stationary contact.

[0011] Preferably, the button is provided with a limiting boss for limiting the first link. The limiting boss is located on one side of the extension line of the first slide groove. When the handle pushes the first sliding part of the first link to slide along the first slide groove close to the first closing end, the limiting boss blocks the rotation of the first link, so that the first link moves linearly in a direction parallel to the length of the first slide groove.

[0012] Preferably, the moving contact mechanism includes a contact support and a latch and a jumper respectively rotatably disposed on the contact support. The contact support is connected to a mechanism spring. The handle is rotatably connected to the eccentric position of the jumper via a second link. The second link can drive the jumper to rotate relative to the contact support. The latch is used to lock the jumper, preventing the jumper from rotating relative to the contact support, and allowing the second link to drive the contact support to rotate via the jumper. The mechanism spring serves as the elastic mechanism.

[0013] Preferably, the line connecting the rotation center of the handle and the rotation center of the jump buckle is the critical position of the second link. When the handle drives the second link to rotate toward the critical position, the end of the second link connected to the handle moves closer to the line connecting the rotation center of the handle and the rotation center of the jump buckle. When the end of the second link connected to the handle crosses the line connecting the rotation center of the handle and the rotation center of the jump buckle, the second link crosses the critical position.

[0014] Preferably, the contact support includes a flat support plate and a support rotating part disposed on the support plate. The support rotating part is rotatably connected to the housing assembly. The support plate is provided with a jumper shaft for mounting the jumper, and the jumper shaft is the rotation center of the jumper.

[0015] Preferably, the buckle shaft and the unlocking shaft are arranged opposite each other on both sides of the support plate along the axial direction of the rotating part, and the buckle shaft and the unlocking shaft are arranged opposite each other on both sides of the rotating part along the radial direction of the rotating part.

[0016] Preferably, the handle component includes a handle rotating part and a handle swinging part disposed radially on the handle rotating part. The handle rotating part is the rotation center of the handle component. The handle swinging part is provided with a second sliding groove and a first connecting hole. The first connecting rod is provided with a second sliding part that slides into the second sliding groove. The second connecting rod is provided with a first connecting part that rotates into the first connecting hole.

[0017] Preferably, the moving contact includes a contact rotating part, and a contact support part and a contact energy storage part disposed opposite to each other on both sides of the contact rotating part. The contact rotating part is the rotation center of the moving contact, and the contact support part is provided with a moving contact point.

[0018] In this embodiment, the contact system has a second sliding groove on the handle that slides with the first link. The moving contact mechanism can open the circuit breaker as soon as the handle moves the second link past the critical position, driven by the elastic mechanism. The button does not need to be fully moved to the opening position, so the opening action begins before the button is in place. Moreover, the opening process is achieved under the drive of the elastic mechanism of the moving contact mechanism, and the opening speed is faster. This reduces the electric arc between the moving contact and the stationary contact and extends the service life.

[0019] A circuit breaker is also provided, which includes a housing assembly and the aforementioned contact system. Attached Figure Description

[0020] Figure 1 This is a front structural diagram of the housing assembly and contact system created by the present invention;

[0021] Figure 2 This is a schematic diagram of the rear structure of the housing assembly and contact system of the present invention;

[0022] Figure 3 This is a schematic diagram of the contact system created in this invention;

[0023] Figure 4 This is a structural schematic diagram of the button component created in this invention;

[0024] Figure 5 This is a schematic diagram of the structure of the handle component of this invention;

[0025] Figure 6 This is a schematic diagram of the contact support structure created by the present invention;

[0026] Figure 7 This is a schematic diagram of the structure of the moving contact created in this invention;

[0027] Figure 8 This is a schematic diagram of the energy storage device created in this invention;

[0028] Figure 9 This is a schematic diagram of the movement of the energy storage device created in this invention during unlocking;

[0029] Figure 10 This is a front structural diagram of the contact system of the present invention in the open state;

[0030] Figure 11 This is a schematic diagram of the back structure of the contact system of the present invention in the open state;

[0031] Figure 12 This is a schematic diagram of the rear structure of the contact system in the energy storage position as described in this invention;

[0032] Figure 13 This is a schematic diagram of the rear structure of the contact system of the present invention in the unlocked position;

[0033] Figure 14 This is a front structural diagram of the contact system for closing the circuit breaker as created in this invention.

[0034] Figure 15 This is a schematic diagram of the back structure of the contact system for closing the circuit breaker in this invention.

[0035] Figure 16 This is a schematic diagram of the contact system for initiating the tripping operation of the present invention;

[0036] Figure 17 This is a schematic diagram of the contact system in a critical position created by the present invention;

[0037] Figure 18 This is a schematic diagram of the contact system for tripping to the designated position created in this invention;

[0038] In the picture:

[0039] 1. Handle mechanism 73-step latch shaft

[0040] 2. Moving contact mechanism 81 First connecting part

[0041] 3 stationary contact 111 second slide groove

[0042] 4. Housing assembly 112 Second trip terminal

[0043] 5. Energy storage mechanism 113 Second closing terminal

[0044] 6 Buttons 114 Handle Rotating Part

[0045] 7 First Link 115 Handle Swing Part

[0046] 8 Second connecting rod 116 First connecting hole

[0047] 11 Handle Parts 211 Unlocking Axis

[0048] 21-contact support 212 support board

[0049] 22 Moving contact 213 Supporting rotating part

[0050] 23 Energy storage spring 220 Contact rotating part

[0051] 24 latches, 221 locking shaft

[0052] 25 jump dunk 222 contact support section

[0053] 26 Mechanism Spring 223 Contact Energy Storage Section

[0054] 51 energy storage device 224 limit claw

[0055] 52 return spring 225 contact locking part

[0056] 61 First Slide 511 Energy Storage Support Unit

[0057] 62 First closing terminal 512 Energy storage rotating part

[0058] 63 First trip terminal 513 Energy storage chute

[0059] 64 limiting bosses, 514 energy storage bosses

[0060] 71 First sliding part 515 Spring hole

[0061] 72 Second sliding part Detailed Implementation

[0062] The following embodiments, in conjunction with the accompanying drawings, further illustrate specific implementations of the contact system created by the present invention. The contact system created by the present invention is not limited to the descriptions of the following embodiments.

[0063] like Figure 1 As shown, the contact system of this embodiment includes a handle mechanism 1, a moving contact mechanism 2, and a stationary contact 3. The handle mechanism 1 drives the contact mechanism 2 to contact and separate from the stationary contact 3 under the drive of an external force.

[0064] This embodiment also provides a circuit breaker, including a housing assembly 4 and two sets of terminals (not shown) respectively disposed in the housing assembly 4, and the contact system. The contact system includes a moving contact mechanism 2 having a moving contact 22 and a stationary contact 3. The moving contact 22 and the stationary contact 3 are respectively connected to the line through the two sets of terminals. When the moving contact 22 and the stationary contact 3 are in contact, the circuit breaker is in the closed state and conducts the line. When the moving contact 22 and the stationary contact 3 are disconnected, the circuit breaker is in the open state and conducts the line.

[0065] like Figure 1-3 As shown, an improvement of the contact system in this embodiment is that it also includes an energy storage mechanism 5. The energy storage mechanism 5 is used to achieve rapid closing. When the moving contact 22 and the stationary contact 3 are in a position where arcing is likely to occur, the energy storage mechanism 5 can accelerate the contact between the contact mechanism and the stationary contact 3.

[0066] Specifically, the moving contact mechanism 2 in this embodiment includes a contact support 21 rotatably disposed in the housing assembly 4, and a moving contact 22 rotatably disposed on the contact support 21. The moving contact 22 and the contact support 21 are connected by an energy storage spring 23. The moving contact 22 is provided with a locking shaft 221, and the contact support 21 is provided with an unlocking shaft 211. The energy storage mechanism 5 includes an energy storage component 51 rotatably disposed. During the process of the contact support 21 driving the moving contact 22 to approach the stationary contact 3, that is, the moving contact 22 moves from the open position to the closed position, the locking shaft 221 contacts the energy storage component 51 before the unlocking shaft 211. The energy storage component 51 blocks the locking shaft 221 on the moving contact 22. After the locking shaft 221 is blocked by the energy storage component 51, the moving contact 22 remains in the energy storage position.

[0067] The contact support 21 continues to rotate relative to the moving contact 22 under the drive of the handle mechanism 1, and compresses the energy storage spring 23 connected between the contact support 21 and the moving contact 22 until the unlocking shaft 211 on the contact support 21 moves to the unlocking position that contacts the energy storage component 51. The unlocking shaft 211 pushes the energy storage component 51 to rotate, so that the energy storage component 51 unlocks the locking shaft 221 and releases the energy storage spring 23, so that the energy storage spring 23 drives the moving contact 22 to the closing position that contacts the stationary contact 3. At this time, the moving contact 22 is in the closing position, and the energy storage position of the moving contact 22 is between the opening position and the closing position. When the moving contact 22 is in the energy storage position, the distance from the stationary contact 3 is a safe distance, and no electric arc will be generated between the moving contact 22 and the stationary contact 3.

[0068] In this embodiment, the contact system locks the moving contact 22 in a safe position where arcing will not occur through the energy storage component 51. After the contact support 21 has stored energy for the energy storage spring 23, it pushes the energy storage component 51 through the unlocking shaft 211, causing the energy storage component 51 to unlock the locking shaft 221 and release the energy storage spring 23. This allows the energy storage spring 23 to drive the moving contact 22 to the closing position where it contacts the stationary contact 3. This not only avoids the problem of arcing caused by too slow closing speed, but also allows the rotating energy storage component 51 to achieve instant unlocking, improving the closing synchronization of the multi-pole circuit breaker. It also features a simple structure and small size.

[0069] like Figure 1-5 As shown, another improvement of the contact system in this embodiment is that it also has a quick tripping function. The contact system includes a button 6 that moves linearly, and a handle mechanism 1 that rotates. A first connecting rod 7 is provided between the button 6 and the handle 11. The handle 11 is connected to the moving contact mechanism 2 via a second connecting rod 8. The moving contact mechanism 2 has an elastic mechanism. The button 6 and the handle 11 are respectively provided with a first sliding groove 61 and a second sliding groove 111. The first connecting rod 7 is respectively provided with a first sliding part 71 for inserting into the first sliding groove 61 and a second sliding part 72 for inserting into the second sliding groove 111. The first sliding part 71 and the second sliding part 72 are respectively inserted into the first sliding groove 61 and the second sliding groove 111. The second sliding groove 111 is arc-shaped. 111 has a second closing end 113 and a second opening end 112 arranged opposite to each other. The distance between the second closing end 113 and the second opening end 112 is greater than the diameter of the second sliding part 72. The second sliding part 72 can slide along the second slide groove 111 between the second closing end 113 and the second opening end 112 of the second slide groove 111. The second closing end 113 is located on the side of the second sliding part 72 away from the button 6. When the second sliding part 72 pushes the second closing end 113 to drive the handle 11 to rotate, it drives the moving contact 22 of the moving contact mechanism 2 to contact the stationary contact 3 through the second connecting rod 8. When the second sliding part 72 pushes the second opening end 112 to drive the handle 11 to rotate, it drives the moving contact 22 of the moving contact mechanism 2 to separate from the stationary contact 3 through the second connecting rod 8, thereby enabling the circuit breaker to close and open.

[0070] During the circuit breaker closing process, that is, during the contact between the moving contact mechanism 2 and the stationary contact 3, the second sliding part 72 pushes the second closing end 113 to drive the handle 11 to rotate. When the handle 11 rotates, it drives the moving contact mechanism 2 to contact the stationary contact 3 through the second connecting rod 8.

[0071] During the circuit breaker tripping process, i.e., the separation of the moving contact mechanism 2 from the stationary contact 3, the push button 6 drives the second sliding part 72 of the first connecting rod 7 to push the second tripping end 112, causing the handle 11 to rotate. This causes the handle 11 to drive the second connecting rod 8 to rotate towards the critical position. The second connecting rod 8 then drives the moving contact 22 of the moving contact mechanism 2 to rotate away from the stationary contact 3, simultaneously storing energy for the elastic mechanism of the moving contact mechanism 2. When the second connecting rod 8 passes the critical position, it releases the elastic mechanism, causing it to release energy and accelerate the rotation of the moving contact 22 towards the stationary contact. At the furthest position of the head 3, the second link 8 will push the handle 11 to continue rotating when the moving contact 22 is away from the stationary contact 3. When the handle 11 rotates, it will drive the second opening end 112 of the second slide groove 111 to slide away from the second sliding part 72, and cause the second closing end 113 to slide close to the second sliding part 72. That is, the second sliding part 72 slides a blank stroke in the second slide groove 111 to prevent the handle 11 from blocking the second sliding part 72 when the moving contact 22 is away from the stationary contact 3, and then drive the first link 7 and the button 6, so that the opening speed is independent of the operating force.

[0072] In this embodiment, the contact system has a second sliding groove 111 on the handle 11 that slides with the first connecting rod 7. The moving contact mechanism 2 can open the circuit breaker as long as the handle 11 drives the second connecting rod 8 past the critical position. The button 6 does not need to be fully moved to the opening position, so the opening action starts before the button 6 is in place. Moreover, the opening process is achieved under the drive of the elastic mechanism of the moving contact mechanism 2, and the opening speed is faster. This reduces the arc between the moving contact 22 and the stationary contact 3 and extends the service life.

[0073] Furthermore, the first slide groove 61 on the button 6 is elongated, and the first slide groove 61 has a first closing end 62 and a first opening end 63 arranged opposite to each other. The distance between the first closing end 62 and the first opening end 63 is greater than the diameter of the first sliding part 71. The first sliding part 71 can slide along the first slide groove 61 between the first closing end 62 and the first opening end 63. The first closing end 62 is located on the side of the first sliding part 71 away from the handle 11. When the button 6 drives the first closing end 62 to push the first sliding part 71, it is used to drive the contact mechanism 2 to contact the stationary contact 3, thereby closing the circuit breaker. When the button 6 drives the first opening end 63 to push the first sliding part 71, it is used to drive the moving contact mechanism 2 to separate from the stationary contact 3, thereby opening the circuit breaker.

[0074] During the opening process of the contact system described above, when the moving contact 22 moves away from the stationary contact 3, the elastic mechanism drives the handle 11 to rotate and drives the second closing end 113 of the second slide groove 111 to push the second sliding part 72 of the first connecting rod 7, so that the first sliding part 71 of the first connecting rod 7 slides away from the second closing end 63 along the first slide groove 61, preventing the button 6 from blocking the first sliding part 71 when the moving contact 22 moves away from the stationary contact 3.

[0075] In this embodiment, the contact system, during the opening process, avoids the second sliding part 72 of the first connecting rod 7 via the second sliding groove 111 of the handle 11, and further avoids the second sliding part 72 of the first connecting rod 7 via the first sliding groove 61. This reduces the lateral dimension and completes the opening action more quickly. It is understood that it is also possible to avoid the second sliding part 72 of the first connecting rod 7 without using the first sliding groove 61, but only using the second sliding groove 111; both are within the scope of protection of this invention.

[0076] Furthermore, the button 6 is provided with a limiting boss 64 for limiting the first connecting rod 7. The limiting boss 64 is located on one side of the extension line of the first slide groove 61. When the handle 11 pushes the first sliding part 71 of the first connecting rod 7 to slide along the first slide groove 61 close to the first closing end 62, the limiting boss 64 is used to block the rotation of the first connecting rod 7, so that the first connecting rod 7 moves linearly in a direction parallel to the length of the first slide groove 61.

[0077] like Figure 3 As shown, the moving contact mechanism 2 includes a latch 24 and a trip latch 25 respectively rotatably mounted on the contact support 21, and a mechanism spring 26 connected to the contact support 21. The handle 11 is rotatably connected to the trip latch 25 at an eccentric position via a second link 8. The second link 8 can drive the trip latch 25 to rotate relative to the contact support 21. The latch 24 is used to lock the trip latch 25, preventing the trip latch 25 from rotating relative to the contact support 21, and allowing the second link 8 to drive the contact support 21 to rotate via the trip latch 25, thereby realizing the opening and closing of the circuit breaker. During the circuit breaker opening process, the mechanism spring 26 serves as an elastic mechanism. The energy storage spring 23 and / or the handle spring that drives the handle 11 can also be provided at the handle 11, which can also serve as an elastic mechanism.

[0078] like Figure 17As shown, the line connecting the rotation center of the handle 11 and the rotation center of the trip latch 25 is the critical position of the second link 8. During the circuit breaker tripping process, when the handle 11 drives the second link 8 to rotate toward the critical position, the end of the second link 8 connected to the handle 11 moves closer to the line connecting the rotation center of the handle 11 and the rotation center of the trip latch 25. When the second link 8 passes the critical position, the end of the second link 8 connected to the handle 11 passes the line connecting the rotation center of the handle 11 and the rotation center of the trip latch 25. After the end of the second link 8 connected to the handle 11 passes the critical position, the force applied by the mechanism spring 26 causes the handle 11 to rotate counterclockwise. During the closing process, the force applied by the mechanism spring 26 will cause the handle 11 to rotate clockwise to the maximum position and then stop (the mechanism reaches the self-locking state). During the opening process, after the end of the second link 8 connected to the handle 11 passes the critical position, the force applied by the mechanism spring 26 will cause the handle 11 to rotate counterclockwise. That is, during the opening process, the end of the second link 8 connected to the handle 11 moves towards the critical position to store energy, and after passing the critical position, the mechanism spring 26 releases energy and the direction of the force of the mechanism spring 26 acting on the contact support 21 changes. The mechanism spring 26 drives the contact support 21 to rotate, causing the moving contact 22 to separate from the stationary contact 3, and at the same time, it causes the handle 11 to rotate counterclockwise.

[0079] like Figure 6 As shown, the contact support 21 includes a flat support plate 212 and a support rotation part 213 disposed on the support plate 212. The support rotation part 213 is rotatably connected to the housing assembly 4 and serves as the rotation center of the contact support 21. The support plate 212 is provided with a jump buckle shaft 73 for mounting the jump buckle 25. The jump buckle shaft 73 is the rotation center of the jump buckle 25. The jump buckle shaft 73 and the unlocking shaft 211 are disposed opposite to each other on the two sides of the support plate 212 along the axial direction of the support rotation part 213, and the jump buckle shaft 73 and the unlocking shaft 211 are disposed opposite to each other on the two sides of the support rotation part 213 along the radial direction of the rotation part.

[0080] like Figure 5 As shown, the handle component 11 includes a cylindrical handle rotating part 114 and a handle swinging part 115 disposed radially on the handle rotating part 114. The handle rotating part 114 is rotatably connected to the housing assembly 4 and serves as the rotation center of the handle component 11, and is provided with a square hole for inserting the operating handle. The handle swinging part 115 is provided with a second sliding groove 111 and a first connecting hole 116. The first connecting rod 7 is provided with a second sliding part 72 that slides into the second sliding groove 111 and engages with it. The second connecting rod 8 is provided with a first connecting part 81 that is rotatably connected to the first connecting hole 116.

[0081] like Figure 7As shown, the moving contact 22 includes a circular contact rotating part 220, and a contact support part 222 and a contact energy storage part 223 disposed opposite to each other on both sides of the contact rotating part 220. The contact rotating part 220 is rotatably connected to the contact support 21 and serves as the rotation center of the moving contact 22. The energy storage spring 23 is a torsion spring. The middle part of the energy storage spring 23 is sleeved on the support rotating part 213 of the contact support 21. The two ends of the energy storage spring 23 are respectively in contact with the contact support 21 and the contact energy storage part 223. The contact energy storage part 223 is provided with a limiting claw 224 for limiting the end of the energy storage spring 23. The contact support part 222 is provided with a moving contact for contacting the stationary contact 3. Preferably, the moving contact is a silver dot. The contact locking part 225 protrudes perpendicular to the axial direction of the contact rotating part 220. The locking shaft 221 is disposed on the side of the contact locking part 225 parallel to the axial direction of the contact rotating part 220.

[0082] Furthermore, the contact support 21 and the energy storage component 51 are disposed opposite each other on the sides of the moving contact 22, and the unlocking shaft 211 passes through the contact support 222 and the contact locking part 225 and extends to the plane where the energy storage component 51 is located.

[0083] like Figure 8 As shown, the energy storage component 51 includes an energy storage support part 511 and an energy storage rotating part 512 disposed on the side of the energy storage support part 511. The energy storage rotating part 512 is rotatably connected to the housing assembly 4 and serves as the rotation center of the energy storage component 51. The energy storage support part 511 has an energy storage groove 513 in the middle, and the locking shaft 221 can slide in the energy storage groove 513. The side wall of the energy storage groove 513 has a protruding energy storage boss 514, which is used to block the locking shaft 221 and keep the moving contact 22 in the energy storage position. The energy storage mechanism 5 also includes a return spring 52, which is used to drive the energy storage... When the energy storage component 51 rotates, the energy storage boss 514 is positioned on the moving path of the locking shaft 221. When the unlocking shaft 211 pushes the energy storage component 51 to unlock the locking shaft 221, it needs to overcome the action of the return spring 52 to drive the energy storage component 51 to rotate. When the energy storage boss 514 is not in contact with the locking shaft 221, the return spring 52 is used to drive the side wall of the energy storage groove 513 to contact and limit the locking shaft 221. Alternatively, a boss structure (not shown in the diagram) is provided on the outside of the energy storage component 51 to limit the energy storage component 51. When the energy storage boss 514 is not in contact with the locking shaft 221, the return spring 52 is used to drive the outside of the energy storage component 51 to contact and limit the boss structure. In this embodiment, the return spring 52 is a torsion spring. The middle part of the return spring 52 is sleeved on the energy storage rotating part 512. The two ends of the return spring 52 are respectively connected to the energy storage support part 511 and the outer shell assembly 4. The energy storage support part 511 is provided with a spring hole 515 for inserting the end of the return spring 52. Of course, the return spring 52 can also be a compression spring or a leaf spring, etc.

[0084] like Figure 10-15 The closing process is shown below:

[0085] like Figure 10 In the shown open position, one end of the first connecting rod 7 is located at the first closing end 62 of the button 6, and the other end is located at the second closing end 113. The locking shaft 221 is in close contact with the groove wall of the energy storage slide 513 on the energy storage component 51. Pressing the button 6 applies a closing force to start the product closing. The closing force is transmitted through the handle mechanism 1 and the second connecting rod 8 to the moving contact mechanism 2. The moving contact mechanism 2 starts to rotate clockwise around the support rotating part 213 of the contact support 21 and compresses the mechanism spring 26. The moving contact 22 moves closer to the stationary contact 3, while driving the locking shaft 221 to slide along the groove wall of the energy storage component 51 to the energy storage position. When the locking shaft 221 contacts the energy storage boss 514, the rotation of the moving contact 22 is blocked and stops. Figure 11 The energy storage position shown is selected close to the stationary contact 3 but not in a position that will cause arcing. The contact support 21 continues to rotate to start the energy storage spring 23 storing energy. At the same time, the unlocking shaft 211 on the contact support 21 moves closer to the energy storage component 51 and moves to the unlocking position where it contacts the energy storage component 51. Figure 12 The unlocking shaft 211 pushes the energy storage component 51 to rotate counterclockwise around the energy storage rotating part 512, causing the locking shaft 221 to slide along the groove wall of the energy storage groove 513 on the energy storage component 51 past the energy storage position. The blocking effect of the energy storage component 51 on the moving contact 22 disappears, and the elastic force of the energy storage spring 23 is released, allowing the moving contact 22 to quickly contact the stationary contact 3. The continuously applied closing force continues to drive the mechanism to rotate. When the end of the second linkage 8 located on the handle side passes the critical position, the moving contact mechanism 2 self-locks, the energy storage spring 23 is compressed again, and the entire mechanism moves to... Figure 14 The closed position is shown.

[0086] like Figure 14-18 The circuit breaker tripping process is shown below:

[0087] like Figure 14 When the circuit breaker is in the closed position shown, pulling the button 6 applies a disengaging force. The button 6 causes the first linkage 7 to slide to the left. When it moves to... Figure 16 When the circuit is in the initial opening position as shown, the first sliding part 71 of the first connecting rod 7 is located at the first opening end 63, and the second sliding part 72 is located at the second opening end 112. The opening force is transmitted through the handle mechanism 1 and the second connecting rod 8 to the moving contact mechanism 2. The moving contact mechanism 2 begins to rotate counterclockwise around the supporting rotating part 213. At this time, the moving contact 22 and the stationary contact 3 remain in contact under the action of the energy storage spring 23. The continuously applied opening force continues to pull the mechanism to rotate. The end of the second connecting rod 8 connected to the handle 11 passes the threshold. Figure 17After reaching the indicated boundary position, the compressed mechanism spring 26 and energy storage spring 23 are released, pushing the entire moving contact mechanism 2 to rotate rapidly counterclockwise, and causing the moving contact 22 to quickly separate from the stationary contact 3. The handle 11 rotates counterclockwise under the drive of the second link 8. The first sliding part 71 of the first link 7 slides from the first opening end 63 to the first closing end 62, and the second sliding part 72 slides from the second opening end 112 to the second closing end 113. The energy storage member 51 rotates clockwise under the action of the reset spring 52 and approaches the locking shaft 221. At this stage, stopping the pull of the handle 11 will not prevent the moving contact 22 from separating from the stationary contact 3 to the maximum position. When the moving and stationary contacts 3 are opened to the maximum position, the first sliding part 71 of the first link 7 moves to the first closing end 62, and the second sliding part 72 moves to the second closing end 113. The entire mechanism moves to the opening position shown in Figure 18.

[0088] It should be noted that the circuit breaker in this embodiment has both fast closing and fast opening functions. Obviously, in other embodiments, only fast closing or fast opening functions may be provided. In some embodiments that only have fast closing, the button 6 may be omitted, and the handle 11 may be rotated and extend out of the housing assembly for operation.

[0089] 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. Therefore, they should not be construed as limiting 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.

[0090] 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 inventive concept, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A contact system comprising a button (6) arranged for linear movement, a handle mechanism (1), a moving contact mechanism (2), and a stationary contact (3), wherein the handle mechanism (1) includes a handle (11) arranged for rotation, a first connecting rod (7) is provided between the button (6) and the handle (11), the handle (11) is connected to the moving contact mechanism (2) via a second connecting rod (8), and the button (6) drives the moving contact (22) of the contact mechanism (2) to contact and separate from the stationary contact (3) via the handle (11), characterized in that: The moving contact mechanism (2) has an elastic mechanism. The handle (11) is provided with a second slide groove (111). The first connecting rod (7) is provided with a second sliding part (72) that inserts into the second slide groove (111). The second slide groove (111) has a second closing end (113) and a second opening end (112) arranged opposite to each other. The second sliding part (72) can slide along the second slide groove (111) between the second closing end (113) and the second opening end (112). When the second sliding part (72) pushes the second closing end (113) to drive the handle (11) to rotate, it drives the moving contact (22) to contact the stationary contact (3) through the second connecting rod (8). When the second sliding part (72) pushes the second opening end (112) to drive the handle (11) to rotate, it drives the moving contact (22) to separate from the stationary contact (3) through the second connecting rod (8). The button (6) can drive the second sliding part (72) of the first link (7) to push the second opening end (112), so that the handle (11) drives the second link (8) to rotate towards the critical position. At the same time, it stores energy for the elastic mechanism of the moving contact mechanism (2). When the second link (8) crosses the critical position, it releases the elastic mechanism, so that the elastic mechanism releases energy and drives the moving contact (22) away from the stationary contact (3). At the same time, it causes the second opening end (112) of the second slide groove (111) to slide away from the second sliding part (72), preventing the handle (11) from blocking the second sliding part (72) when the moving contact (22) is away from the stationary contact (3).

2. The contact system according to claim 1, characterized in that: The button (6) is provided with a first slide groove (61), the first slide groove (61) has a first closing end (62) and a first opening end (63) arranged opposite to each other, the first connecting rod (7) is provided with a first sliding part (71) for inserting into the first slide groove (61), the first sliding part (71) can slide along the first slide groove (61) between the first closing end (62) and the first opening end (63), the first closing end (62) is located on the side of the first sliding part (71) away from the handle (11), when the button (6) drives the first closing end (62) to push the first sliding part (71), it is used to drive the contact mechanism (2) to contact the stationary contact (3), when the button (6) drives the first opening end (63) to push the first sliding part (71), it is used to drive the moving contact mechanism (2) to separate from the stationary contact (3); When the moving contact (22) moves away from the stationary contact (3), the elastic mechanism drives the handle (11) to rotate and drives the second closing end (113) of the second slide groove (111) to push the second sliding part (72) of the first link (7), so that the first sliding part (71) of the first link (7) slides away from the second closing end (63) along the first slide groove (61), preventing the button (6) from blocking the first sliding part (71) when the moving contact (22) moves away from the stationary contact (3).

3. The contact system according to claim 2, characterized in that: The button (6) is provided with a limiting boss (64) for limiting the first connecting rod (7). The limiting boss (64) is located on one side of the extension line of the first slide groove (61). When the handle (11) pushes the first sliding part (71) of the first connecting rod (7) to slide along the first slide groove (61) close to the first closing end (62), the limiting boss (64) blocks the first connecting rod (7) from rotating, so that the first connecting rod (7) moves linearly in a direction parallel to the length of the first slide groove (61).

4. The contact system according to claim 1, characterized in that: The moving contact mechanism (2) includes a contact support (21) and a latch (24) and a jumper (25) respectively rotatably mounted on the contact support (21). The contact support (21) is connected to the mechanism spring (26). The handle (11) is rotatably connected to the jumper (25) at an eccentric position via a second link (8). The second link (8) can drive the jumper (25) to rotate relative to the contact support (21). The latch (24) is used to lock the jumper (25) so that the jumper (25) cannot rotate relative to the contact support (21), and the second link (8) can drive the contact (22) and the contact support (21) to rotate via the jumper (25). The mechanism spring (26) serves as the elastic mechanism.

5. The contact system according to claim 4, characterized in that: The line connecting the rotation center of the handle (11) and the rotation center of the jump buckle (25) is the critical position of the second link (8). When the handle (11) drives the second link (8) to rotate toward the critical position, the end of the second link (8) connected to the handle (11) moves closer to the line connecting the rotation center of the handle (11) and the rotation center of the jump buckle (25). When the end of the second link (8) connected to the handle (11) crosses the line connecting the rotation center of the handle (11) and the rotation center of the jump buckle (25), the second link (8) crosses the critical position.

6. The contact system according to claim 4, characterized in that: The contact support (21) includes a flat support plate (212) and a support rotating part (213) disposed on the support plate (212). The support rotating part (213) is rotatably connected to the housing assembly (4). The support plate (212) is provided with a jump buckle shaft (73) for installing the jump buckle (25). The jump buckle shaft (73) is the rotation center of the jump buckle (25).

7. The contact system according to claim 6, characterized in that: The jump buckle shaft (73) and the unlocking shaft (211) are arranged opposite to each other on both sides of the support plate (212) along the axial direction of the support rotation part (213), and the jump buckle shaft (73) and the unlocking shaft (211) are arranged opposite to each other on both sides of the support rotation part (213) along the radial direction of the rotation part.

8. The contact system according to claim 1, characterized in that: The handle component (11) includes a handle rotating part (114) and a handle swing part (115) disposed radially on the handle rotating part (114). The handle rotating part (114) is the rotation center of the handle component (11). The handle swing part (115) is provided with a second sliding groove (111) and a first connecting hole (116). The first connecting rod (7) is provided with a second sliding part (72) that slides into the second sliding groove (111) and the second connecting rod (8) is provided with a first connecting part (81) that is rotatably connected to the first connecting hole (116).

9. The contact system according to claim 1, characterized in that: The moving contact (22) includes a contact rotating part (220), and a contact support part (222) and a contact energy storage part (223) disposed opposite to each other on both sides of the contact rotating part (220). The contact rotating part (220) is the rotation center of the moving contact (22), and the contact support part (222) is provided with a moving contact.

10. A circuit breaker, characterized in that: It includes the housing assembly (4) and the contact system as described in any one of claims 1-9.

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