An electrical leakage circuit breaker

Abstract

The application relates to an electric leakage circuit breaker, which comprises a circuit breaker shell, a handle, a tripping device arranged in the circuit breaker shell, a tripping mechanism, a partition plate, a test button, a contact spring and a button spring, the partition plate is provided with a first mounting groove for mounting the contact spring and a second mounting groove for mounting the button spring, the first mounting groove is provided with a first positioning member, a plurality of positioning blocks and a first positioning through groove, the contact spring is arranged on the first positioning member, the second mounting groove is provided with a second positioning member and a second positioning through groove, the button spring is arranged on the second positioning member, one end of the button spring is clamped in the second positioning through groove, and the other end of the button spring is located below the test button and abuts against the test button. By adopting the above technical scheme, the electric leakage circuit breaker provided by the application has stable contact spring and button spring structures, the spring is not prone to disengagement during spring movement, the overall structural layout is reasonable, the space utilization rate is high, and the occupied space of a magnetic ring is not affected.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of circuit breakers, in particular to a residual current circuit breaker. BACKGROUND

[0002] A residual current circuit breaker is a switch that automatically operates when the leakage current in a circuit exceeds a predetermined value.

[0003] A circuit breaker generally comprises a contact system, an arc extinguishing system, an operating mechanism, a tripping device, a circuit breaker housing, etc. The Chinese utility model patent with the publication number CN210223918U discloses a residual current circuit breaker with positive and negative wiring, which comprises a first housing, a first circuit breaker unit arranged in the first housing, the first circuit breaker unit comprising a first movable contact, a first stationary contact, a first arc extinguishing chamber, a first handle operating mechanism, and a first tripping device, a test circuit and a residual current circuit board power taking device arranged in the first housing, the test circuit and the residual current circuit board power taking device comprising a button, a first conductive ring, a second conductive ring, a first power taking torsional spring, and a second power taking torsional spring, the first conductive ring and the second conductive ring being arranged on a first mounting column and a second mounting column of the first housing respectively, the first power taking torsional spring being sleeved on a third mounting column of the first housing, a first extension arm of the first power taking torsional spring being in contact with the second conductive ring to realize electrical connection, a second extension arm of the first power taking torsional spring being arranged below the button and corresponding to the first conductive ring, the button being pressed down to realize electrical connection between the second extension arm of the first power taking torsional spring and the first conductive ring, the second power taking torsional spring being arranged on a fourth mounting column of the first housing, a first extension arm of the second power taking torsional spring being in electrical connection with the first movable contact, a toggle lever being arranged on a movable contact mounting seat of the first handle operating mechanism, the toggle lever being arranged corresponding to a second extension arm of the second power taking torsional spring, when the circuit breaker is closed, the second extension arm of the second power taking torsional spring is in contact with the second conductive ring to realize electrical connection, when the circuit breaker is opened, the toggle lever drives the second extension arm of the second power taking torsional spring to rotate to separate the second extension arm from the second conductive ring.

[0004] The above-mentioned circuit breaker has the following problems:

[0005] 1. The power taking structure is complex, the two torsional springs need to realize circuit conduction through the conductive rings, and the torsional spring mounting structure is not stable, so that the torsional spring is easy to be separated when moving, causing the circuit to be disconnected.

[0006] 2. The installation of the magnetic ring requires a large space, and the performance of some products is unstable due to the small magnetic ring.

[0007] 3. The base of the circuit breaker is integrally molded, and there are installation spaces on both sides of the base for installing wiring terminals. However, its integral design makes it very difficult to assemble wires, and because of the small space, it is impossible to use busbar wiring, which often causes a lot of trouble for users. Summary of the Invention

[0008] The purpose of this invention is to overcome the shortcomings of the prior art. This invention provides a residual current circuit breaker with stable contact spring and button spring structure, which is not easy to disengage when the spring moves. Moreover, the overall structure layout is reasonable, the space utilization rate is high, and it does not affect the space occupied by the magnetic ring.

[0009] The technical solution of this invention: A residual current circuit breaker includes a circuit breaker housing, a handle, a trip unit, a tripping mechanism, a partition, a test button, a contact spring that contacts the moving contact, and a button spring. The tripping mechanism includes a latch, a trip latch, and a latch spring. The trip latch is rotatably disposed within the circuit breaker housing. The trip latch and the handle are linked together by a connecting rod. The latch is rotatably disposed, and the latch spring acts on the latch, causing one end of the latch to engage with the trip latch to achieve the closing operation of the handle. The contact spring and the button spring are separately disposed or integrally formed. The partition has a first mounting groove for installing the contact spring and a second mounting groove for installing the button spring. The circuit breaker housing has a first mounting slot containing a first positioning element, several positioning blocks, and a first positioning through slot. A contact spring is mounted on the first positioning element, with one end of the contact spring engaged in the first positioning through slot and the other end in contact with a button spring. Each positioning block is pressed against the outer surface of the contact spring. The second mounting slot contains a second positioning element and a second positioning through slot. A button spring is mounted on the second positioning element, with one end engaged in the second positioning through slot and the other end located below and in contact with the test button. A contact plate is located on the circuit breaker housing below the button spring. The button spring contacts the contact plate to achieve circuit conduction, and the button spring separates from the contact plate to achieve circuit disconnection.

[0010] The above technical solution features a reasonable structural layout, high space utilization, and a stable spring structure. When the two springs move, they are less likely to detach from the partition, resulting in a more stable circuit connection. A moving contact assembly is located on the other side of the partition. This moving contact assembly is a conductive component. When the product is closed, the moving contact assembly rotates and contacts the contact arm of the contact spring located in the first positioning slot. Because the other contact arm is in contact with the button spring, pressing the test button connects the test button to the contact plate, thus completing the test circuit. When the product is disconnected, the mechanism returns, and the moving contact assembly disconnects from the contact arm of the contact spring located in the first positioning slot. At this point, no matter how the test button is pressed, the test circuit cannot be completed. Therefore, the product does not have the risk of failure due to burnt-out test circuit resistors.

[0011] The further arrangement of the present application is that the contact spring comprises a first positioning hole, a first arm on both sides of the first positioning hole, and a contact arm at the end of the first arm, the first positioning member is located in the first positioning hole, and each positioning block is located on the outside of the first arm, one contact arm is clamped in the first positioning slot, and the other contact arm is in contact with the button spring, the button spring comprises a second positioning hole, a second arm on both sides of the second positioning hole, and a positioning arm at the end of one second arm, the second positioning member is located in the second positioning hole, and the positioning arm is clamped in the second positioning slot, and the second arm is in contact with the test button.

[0012] By adopting the further arrangement, the positioning hole on the contact spring is clamped on the first positioning member in the first mounting slot of the partition plate, the positioning hole on the button spring is clamped on the second positioning member in the second mounting slot of the partition plate, the positioning arm on the first arm is clamped in the second positioning slot, the button spring is fixed, one contact arm of the contact spring is in contact with the button spring, the other contact arm is clamped in the first positioning slot, and each positioning block is clamped on the contact spring, so that the contact spring is positioned and prevented from falling out.

[0013] The further arrangement of the present application is that the tripping mechanism further comprises a bracket, a push piece, and a push rod, the lock catch is rotationally arranged on the bracket, the bracket is rotationally arranged on the partition plate through a first mounting shaft, the lock catch is arranged on the first mounting shaft, the push piece is rotationally arranged on the partition plate through a second mounting shaft and located above the tripping device, the push piece is in contact with the top rod on the tripping device, the push rod is rotationally arranged on the partition plate, the push rod is provided with a first push rod arm and a second push rod arm, the first push rod arm is in contact with the upper end surface of the push piece, the second push rod arm is provided with a long slot, the lock catch and the second push rod arm are connected through a pull rod, one end of the pull rod is fixed on the lock catch, and the other end is slidably arranged in the long slot, the tripping device drives the push piece to swing, drives the push rod to swing, and drives the lock catch to swing to achieve tripping, the circuit breaker shell is further provided with a push piece spring for resetting the push piece and a bracket spring for resetting the bracket, the push piece spring is arranged on the push piece and in contact with or spaced from the bracket at one end.

[0014] With the above-described further configuration, the first mounting shaft is placed on the partition after passing through the shaft hole of the bracket. The latch is then placed on the first mounting shaft, and the trip latch and latch spring are placed on the bracket. The bracket spring is located on the lower side of the bracket. The trip unit is installed below the lever, and the lever spring is installed into the lever. The lever with the lever spring installed is mounted on the partition via the second mounting shaft, with the trip unit's push rod abutting against the lever. The lever is installed inside the circuit breaker housing, with its first arm abutting against the lever. The two ends of the pull rod are respectively inserted into the latch slot and the long slot of the pull rod. Pushing the handle causes the trip latch and latch to engage under the action of the latch spring. The connecting rod pushes the trip latch, thereby pushing the latch and bracket to rotate clockwise around the first mounting shaft. The bracket separates from one end of the lever spring, and the latch drives the pull rod... When the lever moves to the left side of the long slot, the product is in the closed position. When a leakage current occurs in the circuit and exceeds the current that the trip unit can withstand, the push rod on the trip unit moves upward, the pull tab rotates around the second mounting shaft, and drives the lever to rotate, thereby driving the pull rod placed in the long slot to move, pulling the latch to unlock the latch from the trip latch. The bracket returns to its original position under the action of the bracket spring, the handle returns to its original position under the action of the handle spring, and the pull rod moves to the right side of the long slot. At this time, under the action of the pull tab spring force, the pull tab pushes the push rod into the trip unit, and the product is completely disconnected. The design of the long slot allows the pull rod to move freely and the angle and space of the pull tab rotation are small, which helps to save space. During the disconnection process, the bracket abuts against the pull tab spring. This leakage trip mechanism has a small overall size, is easy to install, and has good stability.

[0015] A further embodiment of the present invention includes: the circuit breaker housing comprising a base plate, a base, a middle base, and a top cover arranged sequentially, the middle base being located between the base and the top cover; multiple bases being provided, arranged sequentially and connected to each other; a baffle plate and several separately arranged terminal blocks being included; each terminal block corresponding to a base; each base having a plug-in groove; each terminal block having a corresponding plug-in piece; the plug-in piece being inserted into the plug-in groove to connect the terminal block to the base; each base having a base mounting groove along its vertical direction and a first positioning groove located on both sides of the base mounting groove; the middle base having a second positioning groove communicating with the first positioning groove; the base plate and the middle base both having a third positioning groove communicating with the base mounting groove; the baffle plate being located in the base mounting groove, with its two sides inserted into the first and second positioning grooves; and both ends of the baffle plate being inserted into the third positioning groove; and each terminal block and the base having a through hole for wires to pass through.

[0016] With the further setting, the parts are assembled on the bases, the wires are pulled out from the through holes, the respective wire holders are aligned and assembled on the corresponding positions on the bases, the wires pass through another through hole, and the plurality of wire holders are assembled on the corresponding positions on the base in sequence. The assembly is simpler, the wire holders can be riveted together, the two side edges of the blocking piece are inserted into the first positioning groove and the second positioning groove on the base, and the upper and lower ends are inserted into the third positioning groove, so that the blocking piece is fixed on the base, the assembly and disassembly are convenient, and the wiring is convenient.

[0017] The further setting of the present application is that the toggle spring is arranged on the placing groove, the first edge of the toggle spring is arranged on the first abutting surface, and the second edge of the toggle spring is arranged on the second abutting surface.

[0018] With the further setting, there is a gap between the toggle spring and the boss, the toggle spring is more relaxed when the trip lever is upwardly pushed, the product can be tripped, the boss is arranged on the first edge of the toggle spring when the product is disconnected, and the trip lever can be pushed back.

[0019] The further setting of the present application is that the mounting plate is fixedly arranged on the first mounting shaft and located outside the lock catch, the mounting plate is provided with a mounting plate mounting groove, and the contact plate is arranged in the mounting plate mounting groove and extends below the second arm of the button spring at one end.

[0020] With the further setting, the structure is compact, the lock catch can be limited, and the lock catch is prevented from being separated from the first mounting shaft.

[0021] The further setting of the present application is that the bracket and the toggle lever are rotationally arranged on the partition plate, the partition plate is provided with a partition plate mounting groove, the bracket is provided with a positioning boss, and the bracket spring is arranged in the partition plate mounting groove and abuttingly arranged on the side wall of the partition plate mounting groove at one end and sleeved on the positioning boss at the other end.

[0022] With the further setting, the bracket spring is limited and prevented from being separated, and the mounting is convenient.

[0023] The further setting of the present application is that the middle base is provided with a through groove for mounting a magnetic ring and a containing groove for containing a bus bar, the containing groove is provided with a plurality of containing grooves and arranged on both sides of the through groove.

[0024] With the further setting, the through slot is arranged to put in the magnetic ring and the wire, and the accommodating slot is arranged to facilitate the placement of the bus bar, whether the user uses the upper bus bar or the lower bus bar, because the product itself is provided with the accommodating slot, the bus bar can be accommodated, and therefore the assembly is convenient.

[0025] The further setting of the application is that the outer side of the baffle is provided with an outwardly protruding baffle connecting table, when the baffle is connected with each base, the baffle connecting table is flush with the outer side of the base, and the upper end surface of the baffle connecting table is in contact with the middle base, and the lower end surface is in contact with the bottom plate.

[0026] With the further setting, the baffle connecting table is flush with the outer side of the base, and because the side edge of the baffle is clamped into the base, the distance between the electrically charged parts of the product and the surface of the product circuit breaker housing is larger, which is safer and more beautiful.

[0027] The further setting of the application is that the lower end of the test button is provided with two extension arms and a tab between the two extension arms, the opposite sides of the two extension arms are each provided with a hook matched with the circuit breaker housing, and the lower end surface of the tab is provided with a groove matched with the second arm of the button spring.

[0028] With the further setting, the two hooks of the button are clamped into the circuit breaker housing to make the button structure stable and not easy to come off, the second arm of the button spring is clamped into the positioning groove of the test button to prevent the button spring from deviating from the pressing route of the test button, and the phenomenon of no contact when the test button is pressed is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the embodiment of the application;

[0030] Figure 2 It is a schematic diagram of the internal structure of the embodiment of the application;

[0031] Figure 3 It is a schematic diagram of the tripping mechanism of the embodiment of the application;

[0032] Figure 4 It is a schematic diagram of the installation of the contact spring and the button spring of the embodiment of the application;

[0033] Figure 5 It is a schematic diagram of the partition plate of the embodiment of the application;

[0034] Figure 6 It is a schematic diagram of the contact spring of the embodiment of the application;

[0035] Figure 7 It is a schematic diagram of the button spring of the embodiment of the application;

[0036] Figure 8Fig. 1 is a schematic view of a contact plate and a test button according to an embodiment of the present application;

[0037] Figure 9 Fig. 2 is a schematic view of the installation of a contact spring and a button spring according to an embodiment of the present application;

[0038] Figure 10 Fig. 3 is a schematic view of the back side of a partition according to an embodiment of the present application;

[0039] Figure 11 Fig. 4 is a schematic view of a complete disconnection according to an embodiment of the present application;

[0040] Figure 12 Fig. 5 is a schematic view of a tripping according to an embodiment of the present application;

[0041] Figure 13 Fig. 6 is a schematic view of a bracket and a partition according to an embodiment of the present application;

[0042] Figure 14 Fig. 7 is a schematic view of a dial according to an embodiment of the present application;

[0043] Figure 15 Fig. 8 is a schematic view of a bracket according to an embodiment of the present application;

[0044] Figure 16 Fig. 9 is a schematic view of a stop according to an embodiment of the present application;

[0045] Figure 17 Fig. 10 is a schematic view of a test button according to an embodiment of the present application;

[0046] Figure 18 Fig. 11 is a schematic view of the installation of each terminal according to an embodiment of the present application;

[0047] Figure 19 Fig. 12 is a schematic view of each base according to an embodiment of the present application;

[0048] Figure 20 Fig. 13 is a schematic view of a base according to an embodiment of the present application;

[0049] Figure 21 Fig. 14 is a schematic view of a middle base according to an embodiment of the present application;

[0050] Figure 22 Fig. 15 is a schematic view of a bottom plate according to an embodiment of the present application. DETAILED DESCRIPTION

[0051] The technical solutions in the embodiments will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0052] It should be noted that all directional indications, such as upper, lower, front, rear, etc., are only used for explanation purposes in describing the present application and do not indicate or imply absolute directions or relative importance of the indicated elements.

[0053] In addition, the terms "first", "second", and the like, as used in the description of the application, are used for descriptive purposes only and should not be construed as indicating or implying relative importance or an ordered sequence. In the description of the application, the term "several" means at least two, for example, two, three, etc., unless otherwise explicitly specified.

[0054] In addition, the technical solutions of various embodiments of the present application can be combined with each other, but it must be based on the realization of the skilled in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, also not within the scope of protection required by the present application.

[0055] As Figures 1-22As shown, a leakage circuit breaker, comprising a circuit breaker housing 1, a handle 2, a trip unit 3 arranged in the circuit breaker housing 1, a trip mechanism 4, a partition plate 5, a test button 6, a contact spring 7 in contact with a movable contact 100 and a button spring 8, arc extinguishing mechanism and the like belong to the prior art, and will not be specifically expanded, the trip mechanism 4 comprises a lock catch 41, a trip catch 42 and a lock catch spring 43, the lock catch spring 43 is arranged in the form of a torsion spring, the trip catch 41 is rotatably arranged in the circuit breaker housing 1, the trip catch 41 and the handle 2 are linked and matched through a connecting rod 20, the lock catch 41 is rotatably arranged, the lock catch spring 43 acts on the lock catch 41, and one end of the lock catch 41 is in abutting cooperation with the trip catch 42 to realize handle closing operation, the contact spring 7 and the button spring 8 are arranged separately or integrally, the partition plate 5 is provided with a first mounting groove 51 for mounting the contact spring 7 and a second mounting groove 52 for mounting the button spring 8, the first mounting groove 51 is provided with a first positioning member 511, a plurality of positioning blocks 512 and a first positioning through groove 513, the contact spring 7 is arranged on the first positioning member 511, one end of the contact spring 7 is clamped in the first positioning through groove 513, the other end is in contact with the button spring 8, and each positioning block 512 is pressed on the outer side surface of the contact spring 7, the second mounting groove 52 is provided with a second positioning member 521 and a second positioning through groove 522, the button spring 8 is arranged on the second positioning member 521, one end of the button spring 8 is clamped in the second positioning through groove 522, and the other end is located below the test button 6 and abuts against the test button 6, the circuit breaker housing 1 is provided with a contact plate 11 below the button spring 8, the button spring 8 contacts the contact plate 11 to realize the conduction of the circuit, and the button spring 8 is separated from the contact plate 11 to realize the disconnection of the circuit, the structure layout is reasonable, the space utilization rate is high, the spring structure is stable, and the two springs are not easy to separate from the partition plate during movement, so that the circuit connection is more stable, the other side of the partition plate 5 is provided with a movable contact assembly, the movable contact assembly is a conductive component, when the product is closed, the movable contact assembly rotates and contacts the contact arm of the contact spring located in the first positioning through groove, because the other contact arm is in contact with the button spring, the test button is pressed, the test button is in conduction with the contact plate, and the test circuit is in conduction, when the product is disconnected, the mechanism returns, the movable contact assembly is disconnected with the contact arm of the contact spring located in the first positioning through groove, at this time, no matter how the test button is pressed, the test circuit cannot be conducted, therefore, the product has no risk of product failure caused by burning of the test circuit resistance.

[0056] The contact spring 7 comprises a first positioning hole 71, first arms 72 on both sides of the first positioning hole 71, and contact arms 74 and 75 at the ends of the first arms 72 and 73. The first positioning member 71 is positioned in the first positioning hole 511, and each positioning block 512 is positioned outside the first arms 72 and 73. One of the contact arms 74 is clamped in the first positioning slot 513, and the other contact arm 75 is in contact with the button spring 8. The button spring 8 comprises a second positioning hole 81, second arms 82 and 83 on both sides of the second positioning hole 81, and a positioning arm 84 at the end of one of the second arms 82. The second positioning member 521 is positioned in the second positioning hole 81, and the positioning arm 84 is clamped in the second positioning slot 522. The other second arm 83 is in contact with the test button 6. The positioning hole 71 of the contact spring 7 is clamped on the first positioning member 511 in the first mounting slot 51 of the partition plate 5, the positioning hole 81 of the button spring 8 is clamped on the second positioning member in the second mounting slot of the partition plate, and the positioning arm on the first arm is clamped in the second positioning slot, so that the button spring is fixed. One of the contact arms of the contact spring is in contact with the button spring, the other contact arm is clamped in the first positioning slot, each positioning block is clamped on the contact spring, and the contact spring is positioned to prevent it from falling out.

[0057] The tripping mechanism 4 further comprises a bracket 44, a push piece 45 and a push rod 46, the jump buckle 42 is rotationally arranged on the bracket 44, the bracket 44 is rotationally arranged on the partition plate 5 through the first mounting shaft 40, the lock buckle 41 is arranged on the first mounting shaft 40, the push piece 45 is rotationally arranged on the partition plate 5 through the second mounting shaft 50 and is located above the tripping device 3, the push piece 45 is in abutment with the top rod 30 on the tripping device 3, the push rod 46 is rotationally arranged on the partition plate 5, the push rod 46 is provided with a first push rod arm 461 and a second push rod arm 462, the first push rod arm 461 is in abutment with the upper end surface of the push piece 45, the second push rod arm 462 is provided with an oblong long slot 4621, the long slot is arranged in an oblong shape, the lock buckle 41 and the second push rod arm 462 are in linkage cooperation through the pull rod 60, specifically, the pull rod 60 is arranged in a "U" shape, one end of the pull rod 60 is fixed on the lock buckle 41, and the other end is slidingly arranged in the long slot 4621, the tripping device 3 drives the push piece 45 to swing, drives the push rod 46 to swing, and drives the lock buckle 41 to swing to realize tripping, the circuit breaker shell 1 is further provided with a push piece spring 16 for resetting the push piece 45 and a bracket spring 17 for resetting the bracket 44, the push piece spring 16 is arranged on the push piece 45 and is in abutment or interval with the bracket 44 at one end, the first mounting shaft 40 is passed through the shaft hole of the bracket 44 and then placed on the partition plate 5, the lock buckle 41 is placed on the first mounting shaft 40, the jump buckle 42 and the lock spring 43 are placed on the bracket 44, the bracket spring 17 is located below the bracket 44, the tripping device 3 is arranged below the push piece 45, the push piece spring 16 is arranged in the push piece 45, the push piece 45 with the push piece spring is arranged on the partition plate 5 through the second mounting shaft 50, the top rod of the tripping device 3 is in abutment with the push piece 45, the push rod 46 is arranged on the partition plate 5 and the first push rod arm 464 of the push rod 46 is in abutment with the push piece 45, the pull rod 60 is inserted into the insertion slot 411 of the lock buckle 41 and the long slot 4621 of the push rod 46 respectively, the handle 2 is pushed, the jump buckle 42 and the lock buckle 41 are in engagement under the action of the lock spring 43, the connecting rod pushes the jump buckle to drive the lock buckle and the bracket to rotate clockwise around the first mounting shaft, the bracket is separated from one end of the push piece spring, the lock buckle drives the pull rod to move to the left side of the long slot, and the product is in a closed position, when the leakage current in the circuit is greater than the current that can be borne by the tripping device, the top rod on the tripping device moves upward, the push piece rotates around the second mounting shaft and drives the push rod to rotate, thereby driving the pull rod arranged in the long slot to move, pulling the lock buckle to unlock the lock buckle and the jump buckle, the bracket is reset under the action of the bracket spring, the handle is reset under the action of the handle spring, the pull rod moves to the right side of the long slot, at this time, the push piece drives the top rod to push into the tripping device under the action of the push piece spring, and the product is completely disconnected, the long slot is arranged to enable the pull rod to be freely movable and the angle and space of the push rod to rotate are small, which is conducive to saving space, the bracket is in abutment with the push piece spring in the process of disconnection, the leakage tripping mechanism has small overall volume, is convenient to install and has good stability.The mounting plate 70 is fixedly arranged on the first mounting shaft 40 and located outside the lock catch 41, and the mounting plate mounting groove 701 is arranged on the mounting plate 70, the contact plate 11 is arranged in the mounting plate mounting groove 701 and extends to below the second arm of the button spring 8 at one end, the structure is compact, the lock catch can be limited and prevented from being separated from the first mounting shaft. The bracket and the lever are rotatably arranged on the partition plate, the partition plate mounting groove 53 is arranged on the partition plate 5, the positioning boss 442 is arranged on the bracket 44, the bracket spring 17 is arranged in the partition plate mounting groove 53 and abuts against the side wall of the partition plate mounting groove 53 at one end and is sleeved on the positioning boss 442 at the other end, the bracket spring 17 is limited and prevented from being separated, and the mounting is convenient.

[0058] Specifically, the lever spring 16 is a torsion spring, the lever 45 is provided with the placing groove 451, the first abutting surface 452 and the second abutting surface 453, the lever spring 16 is arranged in the placing groove 451 and the first edge 161 of the lever spring 16 abuts against the first abutting surface 452 and the second edge 162 abuts against the second abutting surface 453, the boss 441 is arranged on the bracket 44, the first edge 161 of the lever spring 16 abuts against or is spaced apart from the boss 441, the first edge 161 of the lever spring 16 is spaced apart from the boss 441 when the product is closed, the first edge 161 of the lever spring 16 abuts against the boss 441 when the product is disconnected, there is a gap between the lever spring 16 and the boss 441, the product can be tripped more easily when the tripping device top rod is upwardly pushed, the tripping device top rod can be pushed back when the product is disconnected, the torsion spring is sleeved on the lever and has few parts, and the assembly is simple and reliable.

[0059] The circuit breaker shell 1 comprises a bottom plate 12, a base 13, a middle seat 14 and an upper cover 15 arranged in sequence, the middle seat 14 is located between the base 13 and the upper cover 15, the base 13 is provided with a plurality of bases 13 arranged in sequence and connected with each other, further comprising a baffle 9 and a plurality of wire holders 10 arranged in parts, each wire holder 10 is connected with each other through a plug-in structure, each wire holder 10 is arranged one by one with the base 13, each base 13 is provided with a plug-in slot 131, each wire holder 10 is provided with a plug-in piece 101, the plug-in piece 101 is inserted into the plug-in slot 131 to realize the connection of the wire holder 10 and the base 13, each base 13 is provided with a mounting slot 132 along the vertical direction and a first positioning slot 133 located on both sides of the mounting slot 132, the middle seat 14 is provided with a second positioning slot 141 communicated with the first positioning slot 133, the bottom plate 12 and the middle seat 14 are provided with a third positioning slot 121, 142 communicated with the base mounting slot 132, the baffle 9 is located in the base mounting slot 132, and the two side edges are inserted into each first positioning slot 133 and second positioning slot 141, the two ends of the baffle 9 are inserted into the third positioning slot 121, 142, each wire holder 10 and the base 13 are provided with a through hole 102, 134 for the wire to pass through, during assembly, the parts are assembled on each base, the wire is pulled out of the through hole, each wire holder is aligned and assembled into the corresponding position on the base, the wire passes through another through hole, and a plurality of wire holders are sequentially assembled into the corresponding position of the base. This assembly method is simpler, each wire holder can be riveted together by riveting, and the two side edges of the baffle are inserted into the first positioning slot and the second positioning slot on the base, the upper and lower ends are inserted into the third positioning slot, so that the baffle is fixed on the base, which is convenient to disassemble and assemble, and the wiring is convenient.

[0060] The outer side of the baffle 9 is provided with an outwardly protruding blocking table 91, when the baffle 9 is connected with each base 13, the blocking table 91 is flush with the outer side of the base 13, and the upper end surface of the blocking table 91 abuts against the middle seat 14, and the lower end surface abuts against the bottom plate 12, the blocking table 91 is flush with the outer side of the base 13, and because the side edge of the baffle 9 is inserted into the base 13, the distance between the live parts of the product and the surface of the product circuit breaker shell is greater, which is safer and more beautiful.

[0061] The middle seat 14 is provided with a through slot 143 for mounting a magnetic ring 200 and a containing slot 144 for accommodating a bus bar, the containing slot 144 is provided with a plurality of containing slots 144 and is arranged on both sides of the through slot 143, the through slot is arranged to put in the magnetic ring and the wire, and the containing slot is arranged to facilitate the placement of the bus bar. No matter whether the user uses the upper bus bar or the lower bus bar, because the product itself is provided with a containing slot, the bus bar can be accommodated, so the assembly is convenient.

[0062] The lower end of the test button 6 is provided with two extension arms 61 and a tab 62 between the two extension arms 61, the opposite sides of the two extension arms 61 are each provided with a clamping hook 611 matched with the circuit breaker shell 1, the lower end surface of the tab 62 is provided with a recess 621 matched with the second arm of the button spring 8, the two clamping hooks of the button are clamped into the circuit breaker shell to make the button structure stable and not easy to be separated, the second arm of the button spring is clamped into the positioning groove of the test button to prevent the button spring from deviating from the pressing route of the test button, and the phenomenon of no contact when the test button is pressed is avoided.

Claims

1. A residual current circuit breaker, comprising a circuit breaker housing, a handle, a trip unit disposed within the circuit breaker housing, a tripping mechanism, a partition, a test button, a contact spring contacting a moving contact, and a button spring, wherein the tripping mechanism includes a latch, a trip latch, and a latch spring; the trip latch is rotatably disposed within the circuit breaker housing; the trip latch and the handle are linked together via a connecting rod; the latch is rotatably disposed; the latch spring acts on the latch, causing one end of the latch to engage with the trip latch to achieve the handle closing operation, characterized in that... The contact spring and the button spring are either separately configured or integrally formed. The partition plate is provided with a first mounting groove for mounting the contact spring and a second mounting groove for mounting the button spring. The first mounting groove is provided with a first positioning element, several positioning blocks, and a first positioning through groove. The contact spring is set on the first positioning element, with one end of the contact spring locked in the first positioning through groove and the other end in contact with the button spring. Each positioning block is pressed on the outer surface of the contact spring. The second mounting groove is provided with a second positioning element and a second positioning through groove. The button spring is set on the second positioning element, with one end locked in the second positioning through groove and the other end located below the test button and abutting against the test button. The circuit breaker housing is provided with a contact plate located below the button spring. The button spring contacts the contact plate to achieve circuit conduction, and the button spring separates from the contact plate to achieve circuit disconnection.

2. The residual current circuit breaker according to claim 1, characterized in that, The contact spring includes a first positioning hole, first arms located on both sides of the first positioning hole, and contact arms located at the ends of the two first arms. The first positioning element is located inside the first positioning hole, and each positioning block is located outside the first arm. One contact arm is engaged in the first positioning through groove, and the other contact arm is in contact with the button spring. The button spring includes a second positioning hole, second arms located on both sides of the second positioning hole, and a positioning arm located at the end of one of the second arms. The second positioning element is located inside the second positioning hole, and the positioning arm is engaged in the second positioning through groove. The other second arm is in contact with the test button.

3. The residual current circuit breaker according to claim 2, characterized in that, The tripping mechanism further includes a bracket, a lever, and a lever. The tripping buckle is rotatably mounted on the bracket, which is rotatably mounted on a partition via a first mounting shaft. The latch is mounted on the first mounting shaft. The lever is rotatably mounted on the partition via a second mounting shaft and is located above the trip unit. The lever abuts against the top rod on the trip unit. The lever is rotatably mounted on the partition and has a first lever arm and a second lever arm. The first lever arm abuts against the upper end face of the lever, and the second lever arm has a long groove. The latch and the second lever arm are linked together by a pull rod. One end of the pull rod is fixed to the latch, and the other end slides in the long groove. The trip unit pushes the lever to swing, which in turn drives the lever to swing, thereby causing the latch to swing and achieve tripping. The circuit breaker housing also includes a lever spring for resetting the lever and a bracket spring for resetting the bracket. The lever spring is mounted on the lever, and one end abuts against or is spaced apart from the bracket.

4. The residual current circuit breaker according to claim 1 or 2, characterized in that, The circuit breaker housing includes a base plate, a base, a middle base, and a top cover arranged sequentially. The middle base is located between the base and the top cover. The partition, tripping mechanism, and tripping device are all arranged between the base and the middle base. Multiple bases are provided, arranged sequentially and connected to each other. The housing also includes a baffle plate and several separately arranged terminal blocks. Each terminal block is arranged in a one-to-one correspondence with a base. Each base has a plug-in slot, and each terminal block has a corresponding plug-in piece. The plug-in piece is inserted into the plug-in slot to connect the terminal block to the base. Each base has a base mounting slot along its vertical direction and a first positioning slot located on both sides of the base mounting slot. The middle base has a second positioning slot communicating with the first positioning slot. The base plate and the middle base both have a third positioning slot communicating with the base mounting slot. The baffle plate is located in the base mounting slot, and its two sides are inserted into the first and second positioning slots. The two ends of the baffle plate are inserted into the third positioning slot. Each terminal block and the base have through holes for wires to pass through.

5. The residual current circuit breaker according to claim 3, characterized in that, The paddle spring is a torsion spring. The paddle has a placement groove, a first contact surface, and a second contact surface. The paddle spring is installed in the placement groove, with the first side of the paddle spring abutting against the first contact surface and the second side abutting against the second contact surface. The bracket has a boss. The first side of the paddle spring abuts against the boss or is spaced apart from the boss. When the product is closed, the first side of the paddle spring is spaced apart from the boss. When the product is opened, the first side of the paddle spring abuts against the boss.

6. The residual current circuit breaker according to claim 3, characterized in that, It also includes a mounting plate, which is fixedly mounted on the first mounting shaft and located outside the buckle. The mounting plate has a mounting groove, and the contact plate is disposed in the mounting groove, with one end extending below the second arm of the button spring.

7. The residual current circuit breaker according to claim 3, characterized in that, The bracket and lever are rotatably mounted on the partition plate. The partition plate is provided with a partition plate mounting groove. The bracket is provided with a positioning boss. The bracket spring is set in the partition plate mounting groove, with one end abutting against the side wall of the partition plate mounting groove and the other end sleeved on the positioning boss.

8. The residual current circuit breaker according to claim 4, characterized in that, The central base is provided with a through groove for installing a magnetic ring and a receiving groove for accommodating a busbar. There are multiple receiving grooves, which are respectively arranged on both sides of the through groove.

9. The residual current circuit breaker according to claim 4, characterized in that, The outer side of the baffle is provided with an outwardly protruding baffle platform. When the baffle is connected to each base, the baffle platform is flush with the outer side of the base, and the upper end of the baffle platform abuts against the middle base, while the lower end of the baffle platform abuts against the bottom plate.

10. The residual current circuit breaker according to claim 2, characterized in that, The lower end of the test button is provided with two extension arms and a protrusion located between the two extension arms. Each of the two extension arms has a hook that cooperates with the circuit breaker housing on the opposite side. The lower end face of the protrusion has a groove that cooperates with the positioning arm of the button spring.

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