Leakage fault indication mechanism of circuit breaker and circuit breaker

Abstract

The present invention provides a leakage fault indication mechanism for a circuit breaker, which includes an indicator and a driving assembly for leakage fault protection. The indicator is rotatably connected to a housing, and a first reset elastic element is connected between the indicator and the housing. The driving assembly is arranged in the housing, and the driving assembly can be switched to a closed and locked state under the drive of a handle. When a leakage fault occurs, a push rod of a leakage fault releaser unlocks the driving assembly, so that under the drive of the driving assembly, an actuating connecting rod disconnects the circuit breaker, and under the drive of the first reset elastic element, the indicator rotates and indicates the leakage fault. The leakage fault indication mechanism of the present invention is completely independent of the switch function of the circuit breaker, and can be used as an independent unit of the circuit breaker, with good independence and high reliability. The present invention also provides a circuit breaker having the above-mentioned leakage fault indication mechanism.

Description

Technical Field

[0001] The invention relates to the field of low-voltage electrical equipment, and in particular to a leakage fault indicating mechanism of a circuit breaker and a circuit breaker. Background Art

[0002] Residual current circuit breaker (RCBO) products not only have the overload and short-circuit protection functions of general miniature circuit breakers, but also have residual current protection functions for personal life safety. However, for existing residual current circuit breaker products, no matter what kind of fault occurs, the circuit breaker product will trip and trip. If customers cannot distinguish the specific fault type that causes the trip based on the appearance of the residual current circuit breaker, there will be safety hazards. In particular, when a leakage fault that endangers life safety occurs, if the switch is closed rashly, there will be potential life safety hazards. For this reason, it is necessary to set a set of leakage fault indication mechanism on the product to indicate the fault type. However, most of the existing leakage fault indication mechanisms are relatively complicated, which brings great inconvenience to production and assembly. Summary of the invention

[0003] The object of the present invention is to provide a leakage fault indication mechanism for a circuit breaker, which can indicate when a leakage fault occurs and has a simple structure and is convenient for production and assembly.

[0004] Another object of the present invention is to provide a circuit breaker having the above-mentioned leakage fault indication mechanism, which can not only indicate to the user whether a leakage fault occurs, but also has a simple structure and is easy to produce and assemble.

[0005] The present invention provides a leakage fault indication mechanism of a circuit breaker, the circuit breaker comprises a housing and a handle rotatably connected to the housing. The housing comprises a leakage fault release and an action connecting rod. The leakage fault indication mechanism of the circuit breaker comprises an indicator and a driving assembly for leakage fault protection. The indicator is rotatably connected to the housing, and a first resetting elastic element is connected between the indicator and the housing. The driving assembly is arranged in the housing, and under the drive of the handle, the driving assembly can be switched to a closed locking state. When a leakage fault occurs, the push rod of the leakage fault release unlocks the driving assembly, so that under the drive of the driving assembly, the action connecting rod disconnects the circuit breaker, and under the drive of the first resetting elastic element, the indicator rotates and indicates the leakage fault. The leakage fault indication mechanism of the present invention is completely independent of the switch function of the circuit breaker, and does not act due to the normal action or overload or short circuit protection action of the circuit breaker, has good independence, can ensure that no erroneous action occurs and transmits wrong fault information to the user, and has high reliability and safety. In addition, since it is completely independent of the switch function of the circuit breaker, the leakage fault indication mechanism can become an independent unit of the circuit breaker, and the user can decide whether to select it, thereby achieving the purpose of reducing costs.

[0006] In another exemplary embodiment of the leakage fault indication mechanism of the circuit breaker, the indicator includes an indicator body and a connecting portion. The indicator body is provided with an indication area. The connecting portion extends along the axial direction of the indicator body, and the connecting portion is used to connect the handle. Under the drive of the handle, the connecting portion can be rotated from the first initial position to the first locking position, and under the action of the first reset elastic element, the connecting portion can be restored from the first locking position to the first initial position.

[0007] In another exemplary embodiment of the leakage fault indication mechanism of the circuit breaker, when a leakage fault occurs, the connecting portion returns to the first initial position, and the indication area is at least partially exposed outside the housing.

[0008] In another exemplary embodiment of the leakage fault indication mechanism of the circuit breaker, a receiving groove is provided on the handle, and the connecting portion extends into the receiving groove and can slide in the receiving groove.

[0009] In another exemplary embodiment of the leakage fault indication mechanism of the circuit breaker, an inner wall on one side of the accommodating groove is a driving surface, and the driving surface can push the connecting portion to rotate.

[0010] In another exemplary embodiment of the leakage fault indication mechanism of the circuit breaker, it further includes a mounting shell, the indicator and the handle are assembled on the mounting shell and straddled on both sides of the mounting shell to facilitate assembly.

[0011] In another schematic embodiment of the leakage fault indication mechanism of the circuit breaker, the driving assembly includes a trip button, a driving rod, a locking rod, an energy storage rod and a coupling rod. The trip button includes a trip button body and a trip button arm. The two ends of the driving rod are rotatably connected to the indicating member and the trip button body. The locking rod is pivotally connected to the housing. A second resetting elastic element is connected between the energy storage rod and the housing. The two ends of the coupling rod are rotatably connected to the trip button body and the energy storage rod. This driving assembly has high reliability.

[0012] In another exemplary embodiment of the leakage fault indication mechanism of the circuit breaker, a third resetting elastic element is connected between the locking rod and the housing.

[0013] In another exemplary embodiment of the leakage fault indication mechanism of the circuit breaker, under the drive of the indicating member, the trip button moves from the second initial position to the second locking position and drives the energy storage rod to compress the second resetting elastic element.

[0014] In another exemplary embodiment of the leakage fault indication mechanism of the circuit breaker, the locking rod can lock the trip button, and after the push rod pushes the locking rod to disengage the trip button, the energy storage rod can drive the trip button to rotate.

[0015] In another exemplary embodiment of the leakage fault indication mechanism of the circuit breaker, the trip button body has a boss. The action link includes a driving arm, and the driving arm has a flange. After the locking rod is disengaged from the trip button, when the energy storage rod drives the trip button to rotate, the boss can act on the flange and drive the action link to move, so as to ensure that the leakage fault indication mechanism can not only indicate the leakage fault, but also unlock the operating mechanism of the circuit breaker, thereby improving safety.

[0016] In another exemplary embodiment of the leakage fault indication mechanism of the circuit breaker, the tripping arm has an escape groove. When the driving assembly is in a closed and locked state, when the actuating link is actuated, the flange can pass through the escape groove to ensure that when the circuit breaker is overloaded or short-circuited, the leakage fault indication mechanism is independent of the operating mechanism of the circuit breaker.

[0017] In another exemplary embodiment of the leakage fault indication mechanism of the circuit breaker, the action link further includes a linkage arm, the drive arm and the linkage arm are respectively located in different chambers of the module, and the linkage arm can unlock the operating mechanism of the circuit breaker.

[0018] In another exemplary embodiment of the leakage fault indication mechanism of the circuit breaker, the housing further comprises a linkage member for connecting another module of the circuit breaker, the linkage member is connected to the actuating link and can rotate under the drive of the actuating link.

[0019] The present invention provides a circuit breaker, including a leakage fault indication mechanism of the circuit breaker. The leakage fault indication mechanism is completely independent of the switch function of the circuit breaker, and does not operate due to the normal operation or overload or short circuit protection operation of the circuit breaker. It has good independence, and can ensure that no false operation occurs and erroneous fault information is transmitted to the user, and has high reliability and safety. In addition, since it is completely independent of the switch function of the circuit breaker, it is convenient to generate and assemble. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the above and other features and advantages of the present invention will be more apparent to those skilled in the art. In the accompanying drawings:

[0021] Figure 1 A schematic structural diagram of a circuit breaker with a leakage fault indication mechanism according to an embodiment of the present invention;

[0022] Figure 2 A schematic structural diagram of a leakage fault indication mechanism according to an embodiment of the present invention;

[0023] Figure 3 for Figure 2 Schematic diagram of the structural breakdown of the leakage fault indication mechanism;

[0024] Figure 4 for Figure 2 A schematic diagram of the partial structural decomposition of the leakage fault indication mechanism;

[0025] Figure 5 for Figure 2 A local enlarged view of the M region;

[0026] Figure 6 for Figure 2 A schematic diagram of the structure of the jump button in FIG.

[0027] Figure 7 for Figure 2 The structural diagram of the action connecting rod in FIG.

[0028] Figure 8 , Fig. 9 Used to illustrate the closing process of the circuit breaker;

[0029] Fig.10 It is a structural schematic diagram of the leakage fault indication mechanism when the circuit breaker of the present invention is normally disconnected;

[0030] Fig.11 It is a structural schematic diagram of the leakage fault indication mechanism when the circuit breaker of the present invention is disconnected due to overload or short circuit fault;

[0031] Fig.12 It is a structural schematic diagram of the leakage fault indicating mechanism of the circuit breaker of the present invention when the driving assembly is unlocked due to a leakage fault;

[0032] Fig.13 for Figure 1 Structural diagram of the L pole of the circuit breaker;

[0033] Fig.14 for Fig.13 Schematic diagram of the structural decomposition of the L pole;

[0034] Fig.15 for Fig.13 A schematic diagram of the structure of the handle in FIG.

[0035] Fig.16 for Fig.13 A schematic diagram of the structure of the bow-shaped connecting rod;

[0036] Fig.17 for Fig.13 A schematic diagram of the structure of the common tripping member in FIG.

[0037] Fig.18 It is a schematic diagram of the structure of the L pole when the circuit breaker of the present invention is closed;

[0038] Fig.19 for Fig.13 Structural diagram of the L pole being unlocked due to the action of the circuit breaker protection function.

[0039] The reference numerals are as follows:

[0040] 100 housing 310 push rod

[0041] 110 Mounting housing 400 Indicator

[0042] 111 positioning pin 410 indicator body

[0043] 112 guide groove 411 indication area

[0044] 113 support member 420 connection part

[0045] 200 handle 430 first resetting elastic element

[0046] 210 handle body 500 drive assembly

[0047] 211 Receiving groove 510 Jump button

[0048] 2111 driving surface 511 jumper arm

[0049] 220 fourth resetting elastic element 5111 avoidance groove

[0050] 300 Leakage fault release 512 Trip body

[0051] 5121 boss 723 second bending portion

[0052] 520 driving rod 724 second connection end

[0053] 530 Locking rod 730 Locking rod

[0054] 531 third resetting elastic element 740 moving contact assembly

[0055] 540 Energy storage rod 741 Pressure spring

[0056] 541 second resetting elastic element 750 coupling rod

[0057] 550 Coupling rod 760 Handle

[0058] 610 Action connecting rod 761 Handle hole

[0059] 611 drive arm 762 return spring installation cavity

[0060] 6111 Limiting guide 763 Return spring

[0061] 6112 flange 764 limiter

[0062] 612 linkage arm 800 static contact assembly

[0063] 620 linkage 900 common release part

[0064] 710 Jumper 910 Trip piece connection slot

[0065] 720 Bow connecting rod 920 Release drive arm

[0066] 721 First connection end 921 Release member collision boss

[0067] 722 first bending portion 930 tripping piece connecting pin DETAILED DESCRIPTION

[0068] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described with reference to the accompanying drawings. In the drawings, the same reference numerals represent components with the same structure or similar structures but the same functions.

[0069] In this document, “exemplary” means “serving as an example, instance or illustration”, and any diagram or implementation described in this document as “exemplary” should not be interpreted as a more preferred or more advantageous technical solution.

[0070] In order to simplify the drawings, only the parts related to the present invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically drawn or marked.

[0071] In this document, "one" not only means "only one", but also means "more than one". In this document, "first", "second", etc. do not indicate their importance or order, but are only used to indicate the difference between them for the convenience of document description. In this document, "module" is used to indicate the width of the circuit breaker. Usually, one module is 18mm.

[0072] See also Figure 1 , which shows a schematic structural diagram of an illustrative embodiment of a circuit breaker with a leakage fault indication mechanism of the present invention. The circuit breaker 10 includes two modules 11 and 12. Among them, the first chamber of the first module 11 is provided with a leakage fault indication mechanism, and the second chamber is provided with an operating mechanism. The user can analyze whether a leakage fault has occurred through the indicator 400 of its leakage fault indication mechanism. The number of modules of the circuit breaker of the present invention can also be greater than two. The operating mechanism of the circuit breaker includes a contact assembly and an actuator assembly. The operating mechanism can control the contact and separation of the contacts to achieve the disconnection and connection of the current circuit. Figure 1 The first module 11 and the second module 12 shown in the figure both have a module width.

[0073] See also Figure 2 , which shows Figure 1 A schematic diagram of a structure of an implementation of a leakage fault indication mechanism in the first module 11. The first module 11 includes a housing 100, a handle 200, a leakage fault indication mechanism, a leakage fault release 300 and an action connecting rod 610, wherein the leakage fault indication mechanism includes an indicator 400 and a driving assembly 500 for leakage fault protection.

[0074] The handle 200 and the indicator 400 are rotatably connected to the housing 100. The leakage fault release 300, the action connecting rod 610 and the driving assembly 500 are arranged in the housing 100. A first reset elastic element 430 is also connected between the indicator 400 and the housing 100.

[0075] When the user manually closes the first module 11, the driving assembly 500 can be switched to the closed locking state under the drive of the handle 200. When a leakage fault occurs, the push rod 310 of the leakage fault release 300 unlocks the driving assembly 500, so that under the drive of the driving assembly 500, the action link 610 disconnects the circuit breaker and the handle 200 is reset; under the drive of the first reset elastic element 430, the indicator 400 rotates and indicates the leakage fault. The first reset elastic element 430 can be a spring.

[0076] The leakage fault indication mechanism of this embodiment is completely independent of the switch function of the circuit breaker. Specifically, the leakage fault indication mechanism is initially closed with the closing of the handle 200; thereafter, it no longer moves with the normal opening and closing operation of the handle 200, nor with the tripping action of the circuit breaker overload and overcurrent protection function; only when a leakage fault that endangers personal safety occurs, the driving component 500 of the leakage fault indication mechanism is unlocked by the push rod 310 of the leakage fault release, and the indicator 400 always remains in the fault indication state until the user clearly and eliminates the fault, and then manually closes the circuit breaker handle again to cancel the fault display.

[0077] In an optional embodiment, the housing 100 further includes a linking member 620 for connecting to another module of the circuit breaker. The linking member 620 is connected to the actuating link 610 and can rotate under the drive of the actuating link 610 .

[0078] See also Figure 3 , which shows Figure 2 The driving assembly 500 includes a trip button 510 , a driving rod 520 , a locking rod 530 , an energy storage rod 540 and a coupling rod 550 .

[0079] See also Figure 5 , which shows Figure 2 The jumper 510 includes a jumper body 512 and a jumper arm 511 (see Figure 6). The two ends of the driving rod 520 are rotatably connected to the indicator 400 and the jumper body 512. Among them, one end of the driving rod 520 extends into the guide groove 112; under the action of the driving rod 520, the jumper body 512 can move along the guide groove 112. The locking rod 530 is pivoted to the housing 100, and one end thereof can abut against and lock the jumper arm 511. A third reset elastic element 531 can also be connected between the locking rod 530 and the housing 100. A second reset elastic element 541 is connected between the energy storage rod 540 and the housing 100. The two ends of the coupling rod 550 are rotatably connected to the jumper body 512 and the energy storage rod 540. When the jumper body 512 moves along the guide groove 112 to the second locking position, the energy storage rod 540 can compress the second reset elastic element 541 to store energy. The second reset elastic element 541 and the third reset elastic element 531 can be springs.

[0080] See also Figure 4 , which shows Figure 2 Schematic diagram of partial structural decomposition of the leakage fault indication mechanism. The indicator 400 includes an indicator body 410 and a connecting portion 420. The indicator body 410 is provided with an indicating area 411. The connecting portion 420 extends along the axial direction of the indicator body 410, and is used to connect the handle 200. Specifically, under the drive of the handle 200, the connecting portion 420 can be rotated from the first initial position to the first locking position. Figure 4 The connecting portion 420 is located at the first initial position. When a leakage fault occurs, under the action of the first resetting elastic element 430, the connecting portion 420 can be restored from the first locking position to the first initial position, and the indicating area 411 is at least partially exposed outside the housing 100, for example Figure 4 The indication area 411 shown in FIG. 1 is completely exposed from the housing 100. The indication area 411 may be in a special color, in a special mark, or in a transparent material.

[0081] In an optional embodiment, the body of the handle 200 is provided with a receiving groove 211. The connecting portion 420 can extend into the receiving groove 211 and can slide in the receiving groove 211. Figure 4 The inner wall of one side of the receiving groove 211 is set as a driving surface 2111, and the handle 200 pushes the connecting part 420 to rotate through the driving surface 2111. Specifically, the body of the handle 200 can be half the module width, and the receiving groove 211 can be annular.

[0082] In another optional embodiment, the first module 11 further includes a mounting housing 110. Figure 4As shown, the indicator 400 and the handle 200 can be respectively assembled on two positioning pins 111 of the mounting housing 110 and straddled on both sides of the mounting housing 110. After assembly, the connecting portion 420 passes through the arc groove of the mounting housing 110 and extends into the receiving groove 211.

[0083] See also Figure 6 , which shows Figure 2 The jump buckle 510 includes a jump buckle body 512 and a jump buckle arm 511. Figure 7 , which shows Figure 2 Schematic diagram of the structure of the action link in FIG. When a leakage fault occurs, the trip button 510 can collide with the action link 610, and the trip button 510 drives the action link 610 to move. When the user manually closes the circuit breaker or the circuit breaker trips due to overload or overcurrent protection function, the action link 610 can avoid the trip button 510 and the lock rod 530 when moving.

[0084] In an optional embodiment, the trip latch body 512 has a boss 5121. The action link 610 includes a driving arm 611, and the driving arm 611 has a flange 6112. After the lock rod 530 is separated from the trip latch 510, when the energy storage rod 540 drives the trip latch 510 to rotate, the boss 5121 can act on the flange 6112 and drive the action link 610 to move. This embodiment can ensure that the leakage fault indication mechanism can not only indicate the leakage fault, but also unlock the operating mechanism of the circuit breaker to improve safety.

[0085] In an optional embodiment, a evasion groove 5111 is further provided on the tripping arm 510. When the driving assembly 500 is in a closed and locked state, when the action link 610 is actuated, the flange 6112 of the driving arm 611 can pass through the evasion groove 5111.

[0086] The action link 610 may also include a linkage arm 612. The driving arm 611 and the linkage arm 612 are respectively located in different chambers of the module, and the linkage arm 612 can unlock the operating mechanism of the chamber where it is located to disconnect the circuit breaker. The action link 610 can realize coordinated action when a circuit breaker fault or leakage fault occurs.

[0087] See now Figure 8 , Fig. 9 Describe the closing process of the circuit breaker. Figure 8 In the embodiment, the handle 200 and the indicator 400 are both in the initial state; the connecting portion 420 of the indicator 400 is located at the first initial position, and the indicating area 411 is exposed from the housing 100; and the trip button 510 is located at the second initial position. Fig. 9In the embodiment, the handle 200 is in a closed state. The connecting portion 420 of the indicator 400 is located at a first locking position, the indicating area 411 is hidden inside the housing 100, and the trip button 510 is located at a second locking position.

[0088] When the user manually closes the handle 200 of the circuit breaker, the accommodating groove 211 of the handle 200 pushes the connecting portion 430 of the indicator 400 to rotate, thereby causing the leakage fault indication mechanism of the present invention to perform a closing operation. The trip button 510 moves along the guide groove 112 under the action of the driving rod 520. Driven by the coupling rod 550, the energy storage rod 540 compresses the second reset elastic element 541 with the contact surface of the support member 113 as a supporting point to store energy. When the connecting portion 420 rotates to the first locking position, the indicating area 411 is hidden inside the circuit breaker, that is, it is displayed to the user as a non-leakage fault state; the trip button 510 moves to the second locking position, and the trip button arm 511 of the trip button 510 rests on the locking rod 530. At this time, the drive assembly 500 is in a closed and locked state.

[0089] See also Fig.10 , which shows a structural schematic diagram of the leakage fault indication mechanism when the circuit breaker of the present invention is normally disconnected. Fig.10 In the embodiment, the handle 200 returns to the initial state, the indicator 400 remains in the closed state, and the connecting portion 420 remains in the first locking position.

[0090] Now combined Fig. 9 and Fig.10 The normal disconnection process of the circuit breaker is described. When the circuit breaker is opened and closed during normal use, the states of the drive assembly 500 and the action link 610 do not change, and the handle 200 rotates and returns from the closed state to the initial state. Because the receiving groove 211 of the handle 200 has enough space, the opening and closing operation has no effect on the leakage fault indication mechanism. The indicator 400 does not rotate due to the rotation of the handle 200, and the indication area 411 of the indicator 400 is still hidden inside the housing 100.

[0091] See also Fig.11 , which shows a structural schematic diagram of the leakage fault indication mechanism when the circuit breaker of the present invention is disconnected due to overload or short circuit fault. Fig.11 In the embodiment, the handle 200 returns to the initial state, the indicator 400 remains in the closed state, and the connecting portion 420 remains in the first locking position.

[0092] Now combined Fig. 9 and Fig.11The process of disconnecting the circuit breaker due to overload or short circuit fault is described. When the circuit breaker is disconnected due to overload or short circuit fault, the position of the action link 610 changes, and the end of the driving arm 611 moves downward along the guide groove 112. Since the escape groove 5111 is provided on the tripping arm 511, the flange 6112 of the driving arm 611 can pass through the escape groove 5111. The limiting guide portion 6111 of the driving arm 611 can smoothly avoid the tripping arm 511 and the locking rod 530 and pass from the lower side thereof. Therefore, the movement from the action link 610 cannot interfere with the leakage fault indication mechanism of the present invention, and the leakage fault indication mechanism remains in a closed and locked state. This can ensure that the leakage fault indication mechanism is independent of the circuit breaker operating mechanism.

[0093] See also Fig.12 , which shows a schematic diagram of the structure of the leakage fault indication mechanism when the circuit breaker of the present invention unlocks the driving component due to a leakage fault. Fig. 9 , Fig.12 as well as Figure 8 The process of the circuit breaker being disconnected due to a leakage fault is described below. When the circuit breaker is disconnected due to a leakage fault, the push rod 310 of the leakage fault release 300 is released and ejected. After the push rod 310 pushes the locking rod 530 to rotate, the jumper arm 511 disengages from the locking rod 530. Therefore, the jumper 510 is unlocked. Under the action of the second reset elastic element 541, the energy storage rod 540 and the coupling rod 550 move rapidly. At this time, the indicator 400 has no time to rotate, and the jumper 510 performs a rapid rotational motion with one end of the driving rod 520 as the center. During the movement, the boss 5121 of the jumper body 512 collides with the flange 6112 of the action link 610, causing the action link 610 to be linked, thereby further unlocking the operating mechanism of the circuit breaker, causing the entire circuit breaker to be disconnected. The entire movement process is as follows: Fig. 9 , Fig.12 as well as Figure 8 As shown. The handle 200 and the indicator 400 rotate and return to the initial state under the action of the fourth reset elastic element 220 and the first reset elastic element 430 respectively. At this time, the indicator area 411 hidden inside the housing 100 is exposed from the housing 100 to inform the user that a leakage fault has occurred. After the user eliminates the fault and closes the handle 200 again, the leakage fault indicator mechanism is turned off. Figure 8 Shows the state switched to Fig. 9 The fourth resetting elastic element 220 may be a spring.

[0094] Therefore, when the circuit breaker handle 200 is closed, the leakage fault indication mechanism can be driven to reset and close, and then the handle 200 is separated from the leakage fault indication mechanism to ensure the stability of the fault indication mechanism; when a leakage fault occurs, the driving component 500 will actively collide with the action link 610 to act, thereby releasing the entire product for disconnection, thereby achieving coordinated action with the existing mechanism of the circuit breaker.

[0095] The present invention also provides a circuit breaker, which includes the leakage fault indication mechanism of any one of the above embodiments. Such a circuit breaker has high reliability and safety.

[0096] Typically, multi-pole standard-sized residual current circuit breakers are designed based on the layout of compact 1PN products.

[0097] Compact 1PN circuit breaker products usually have L-pole operating mechanisms and N-pole operating mechanisms, using L / N integrated or L / N split types. Regardless of the above method, the operation is driven by the same handle and connecting rod, so that the L-pole and N-pole can be opened and closed synchronously. The connecting rod and main mechanism parts are not assembled on the same side of the product.

[0098] In multi-pole circuit breaker products, any pole only needs an L-pole operating mechanism. Therefore, it is necessary to optimize the existing operating mechanism of compact 1PN circuit breaker products to save space as much as possible, so as to meet the product performance, integrate multiple electronic control functions, and improve assembly efficiency.

[0099] In terms of specific implementation, the existing design adopts the following two methods: (1) In a compact space (about 1.5 modules), the operating mechanism of the circuit breaker is driven by the same handle and connecting rod to control the opening and closing of the two L poles. In this way, one set of mechanisms still controls the opening and closing of two contacts, which is not flexible enough; (2) The single-pole operating mechanism controls the opening and closing of the single-pole contact, and the overall size of the arc extinguishing system is reduced by half to place the leakage function component. This method will sacrifice the breaking performance of the product. In addition to the above two methods, the present invention also proposes a new design scheme, which will be combined with the following Figures 13 to 19 Provide explanation.

[0100] See also Fig.13 , which shows Figure 1 A schematic diagram of the structure of an implementation of the L pole of the circuit breaker. Specifically, the L poles of the first module 11 and the second module 12 can both adopt this structure.

[0101] In this embodiment, the L-pole operating mechanism uses a bow-shaped connecting rod 720. This operating mechanism can realize the contact and disconnection of the moving contact assembly and the static contact assembly, and the connection with the external accessories can realize switch control or signal transmission. It occupies a small space (half the module), has low cost, and is easy to assemble.

[0102] See also Fig.14 , which shows Fig.13 The second module 12 includes a housing, a handle 760, a bow-shaped connecting rod 720, a tripping latch 710, a coupling rod 750, a locking rod 730, a common tripping member 900, a contact assembly 740 and a static contact assembly 800.

[0103] The handle 760 and the common release member 900 are rotatably connected to the housing. The bow connecting rod 720, the tripping latch 710, the locking rod 730, the moving contact assembly 740, and the coupling rod 750 are arranged in the housing. The locking rod 730 is pivotally connected to the housing. A reset spring 763 is connected between the handle 760 and the housing, and the handle 760 has a width of half a module (the entire module width can also be used according to design requirements). A pressure spring 741 is connected between the moving contact assembly 740 and the housing.

[0104] See also Fig.15 , which shows Fig.13 Schematic diagram of the structure of the handle in FIG. The handle 760 is provided with a handle hole 761, a reset spring installation cavity 762 and a limit portion 764. The handle hole 761 is used to connect one end of the bow-shaped connecting rod 720. The reset spring installation cavity 762 is used to install the reset spring 763. The limit portion 764 is used to limit the rotation of the reset spring 763.

[0105] See also Fig.16 , which shows Fig.13 Schematic diagram of the structure of the bow-shaped connecting rod in FIG. The bow-shaped connecting rod 720 includes a first connecting end 721, a first bending portion 722, a second bending portion 723 and a second connecting end 724. The first connecting end 721 is connected to the handle 760, and the second connecting end 724 is connected to the jump buckle 710. A bending angle is formed between the first bending portion 722 and the second bending portion 723. Fig.19 , a bending angle is set on the bow-shaped connecting rod 720, so that the bow-shaped connecting rod 720 can avoid the coupling rod 750 during movement. In addition, multiple bending angles can be set between the first connecting end 721 and the second connecting end 724 as needed. By setting multiple bending angles, it can be further ensured that the bow-shaped connecting rod 720 avoids the coupling rod 750 during movement.

[0106] See also Fig.17 , which shows Fig.13Schematic diagram of the structure of the common release member in FIG. The common release member 900 includes a common release member body and a release member driving arm 920. The two ends of the common release member body are respectively provided with a release member connecting groove 910 and a release member connecting pin 930; the end of the release member driving arm 920 is provided with a release member collision boss 921. The common release member 900 can realize the release control of adjacent poles when multiple poles are spliced ​​(or when spliced ​​with external accessories).

[0107] When a multi-pole product automatically disconnects due to the action of the protection function, it needs to use the common tripping part 900. The tripping part connecting pin 930 of the common tripping part 900 is connected to the tripping part connecting groove of another common tripping part. During the rotation process, the tripping part 710 will hit the tripping part collision boss 921 of the tripping part driving arm 920 to drive the common tripping part 900 to rotate, and the rotation will drive the common tripping parts of other poles to rotate together through the tripping part connecting pin 930. In the operating mechanism of other poles, the common part driving arm will push the lock rod to rotate, unlock the operating mechanism of the corresponding pole, and disconnect its contact.

[0108] Now combined Fig.13 and Fig.18 To illustrate the normal closing and opening process of the L-pole operating mechanism.

[0109] Fig.13 It shows the initial state of the user before closing the L-pole operating mechanism. Fig.13 In the state shown, the user pushes the handle 760 to rotate counterclockwise. Driven by the handle 760, the second connection end 724 of the bow-shaped connecting rod 720 is driven to move downward along the guide groove on the housing. In the process of the jumper 710 following the second connection end 724 to move downward, first, the jumper arm of the jumper 710 contacts one end of the locking rod 730 and is locked by the locking rod 730; then, the jumper 710 drives the moving contact assembly 740 to move through the coupling rod 750 until the moving contact assembly 740 contacts the static contact assembly 800 to complete the closing operation. At this time, the L-pole operating mechanism is as shown in FIG. Fig.18 shown.

[0110] Fig.18 The diagram shows the structure of the L pole when the circuit breaker is closed. Fig.18 In the state shown, the user pushes the handle 760 to rotate clockwise. The handle 760 drives the bow-shaped connecting rod 720 to move upward along the guide groove on the housing, and the moving contact assembly 740 quickly leaves the stationary contact assembly 800 under the drive of the pressure spring 741 until the moving contact assembly 740 collides with the limiting part of the housing. At the same time, the trip button 710 and the coupling rod 750 are reset to complete the disconnection operation.

[0111] See also Fig.19, which shows Fig.13 The schematic diagram of the structure when the L pole is unlocked due to the action of the circuit breaker protection function. Fig.18 , Fig.19 as well as Fig.13 To illustrate the process of the L-pole operating mechanism being disconnected due to the protection function.

[0112] When the circuit breaker product is disconnected due to the action of the protection function (such as overload, overcurrent, etc.), the actuator of the thermal system or the magnetic system will push or pull the lock rod 730 to rotate, and the lock rod 730 will leave the contact position with the trip button 710, and the trip button arm of the trip button 710 will lose the support of the lock rod 730 and unlock the operating mechanism. Under the action of the pressure spring 741, the moving contact assembly 740 and the coupling rod 750 move quickly to reset. At this time, the handle 760 has no time to react and is still in the closed position. The trip button 710 is centered on the second connection end 724 of the bow-shaped connecting rod 720, and quickly rotates and moves to the limiting feature of the housing. The bow feature of the bow-shaped connecting rod 720 can better avoid the boss feature of the trip button 710, and the bending angle of the bow-shaped connecting rod 720 can avoid the coupling rod 750, so that the tripping process is completed smoothly. Thereafter, under the action of the reset spring 763, the handle 760 and the trip button 510 are reset to the disconnected position.

[0113] In this embodiment, a single operating mechanism controls only a single contact, and can be more flexibly applied to various types of products (such as 2P / 3P / 4P); and the operating mechanism occupies a small space, and only occupies half of the module space to which it belongs. The other half of the module space can be used for the following functions: (1) If a set of mechanisms is assembled, the auxiliary switch (AS) or fault indication (FC) function can be realized; (2) If a set of electronic components is assembled, many other control functions can be realized (such as communication, remote control, automatic reclosing, etc.). This new operating mechanism can optimize the assembly process, realize single-side assembly of all parts, and save production costs. Alternatively, within the single module range, the other half of the corresponding space can be assembled with a complete set of independent operating mechanisms, thereby realizing double-handle control of two-pole products.

[0114] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0115] The series of detailed descriptions listed above are only specific descriptions of feasible embodiments of the present invention. They are not intended to limit the scope of protection of the present invention. Any equivalent implementation scheme or changes that do not deviate from the technical spirit of the present invention, such as combination, division or repetition of features, should be included in the scope of protection of the present invention.

Claims

1. A leakage fault indication mechanism for a circuit breaker, the circuit breaker comprising a housing (100) and a handle (200) rotatably connected to the housing (100), the handle (200) being provided with a receiving groove (211), the housing (100) comprising a leakage fault release (300) and an actuating connecting rod (610), It is characterized in that The leakage fault indication mechanism of the circuit breaker comprises: an indicator (400) rotatably connected to the housing (100), a first resetting elastic element (430) being connected between the indicator (400) and the housing (100), the indicator (400) comprising an indicator body (410) and a connecting portion (420), the connecting portion (420) extending into the accommodating groove (211) and being capable of sliding in the accommodating groove (211); A drive assembly (500) for leakage fault protection is arranged in the housing (100). When driven by the handle (200), the drive assembly (500) can be switched to a closed and locked state. The drive assembly (500) comprises: A trip button (510) comprising a trip button body (512) and a trip button arm (511); under the drive of the indicator (400), the trip button (510) can move from a second initial position to a second locking position; when the trip button (510) is located at the second locking position, the driving assembly (500) is in a closed locking state; a locking rod (530) pivotally connected to the housing (100), the locking rod (530) being capable of locking the trip latch (510); and a driving rod (520), two ends of which are rotatably connected to the indicating member (400) and the trip button body (512); When a leakage fault occurs, the push rod (310) of the leakage fault release (300) unlocks the drive assembly (500), so that under the drive of the drive assembly (500), the action link (610) disconnects the circuit breaker, and under the drive of the first resetting elastic element (430), the indicator (400) rotates and indicates the leakage fault.

2. The leakage fault indication mechanism of the circuit breaker according to claim 1, Features: The indicator body (410) is provided with an indication area (411); The connecting portion (420) extends along the axial direction of the indicator body (410), and the connecting portion (420) is used to connect to the handle (200); Under the drive of the handle (200), the connecting portion (420) can rotate from a first initial position to a first locking position, and under the action of the first resetting elastic element (430), the connecting portion (420) can return from the first locking position to the first initial position.

3. The leakage fault indication mechanism of the circuit breaker according to claim 2, Features: When a leakage fault occurs, the connection portion (420) returns to the first initial position, and the indication area (411) is at least partially exposed outside the housing (100).

4. The leakage fault indication mechanism of the circuit breaker according to claim 1, Features: One inner wall of the accommodating groove (211) is a driving surface (2111), and the driving surface (2111) is capable of pushing the connecting portion (420) to rotate.

5. The leakage fault indication mechanism of the circuit breaker according to claim 1, It is characterized in that It also includes a mounting shell (110), wherein the indicator (400) and the handle (200) are assembled on the mounting shell (110) and straddle two sides of the mounting shell (110).

6. The leakage fault indication mechanism of the circuit breaker according to claim 1, It is characterized in that The driving assembly (500) further comprises: an energy storage rod (540), a second resetting elastic element (541) being connected between the energy storage rod and the housing (100); and A coupling rod (550) has two ends rotatably connected to the tripping buckle body (512) and the energy storage rod (540) respectively.

7. The leakage fault indication mechanism of the circuit breaker according to claim 6, It is characterized in that A third resetting elastic element (531) is connected between the locking rod (530) and the housing (100).

8. The leakage fault indication mechanism of the circuit breaker according to claim 6, It is characterized in that Under the drive of the indicator (400), the trip button (510) drives the energy storage rod (540) to compress the second resetting elastic element (541).

9. The leakage fault indication mechanism of the circuit breaker according to claim 8, Features: After the push rod (310) pushes the locking rod (530) to disengage from the jump buckle (510), the energy storage rod (540) can drive the jump buckle (510) to rotate.

10. The leakage fault indication mechanism of the circuit breaker according to claim 6, Features: The jump button body (512) has a boss (5121); The action link (610) comprises a driving arm (611), and the driving arm (611) has a flange (6112); After the locking rod (530) is separated from the tripping buckle (510), when the energy storage rod (540) drives the tripping buckle (510) to rotate, the boss (5121) can act on the flange (6112) and drive the action connecting rod (610) to move.

11. The leakage fault indication mechanism of the circuit breaker according to claim 10, Features: The tripping arm (511) has an avoidance groove (5111); When the driving assembly (500) is in a closed and locked state, when the actuating link (610) is actuated, the flange (6112) can pass through the avoidance groove (5111).

12. The leakage fault indication mechanism of the circuit breaker according to claim 10, It is characterized in that The action link (610) further comprises a linkage arm (612), the drive arm (611) and the linkage arm (612) are respectively located in different chambers of the module, and the linkage arm (612) is capable of unlocking the operating mechanism of the circuit breaker.

13. The leakage fault indication mechanism of the circuit breaker according to claim 1, Features: The housing (100) further comprises a linking member (620) for connecting to another module of the circuit breaker; the linking member (620) is connected to the actuating connecting rod (610) and is capable of rotating under the drive of the actuating connecting rod (610).

14. Circuit breaker, It is characterized in that The invention comprises a leakage fault indication mechanism of a circuit breaker as claimed in any one of claims 1 to 13.

Images