Circuit breaker

Abstract

The circuit breaker comprises a shell, a circuit breaker pole and an electric leakage protection module, the circuit breaker pole comprises an operating mechanism, the operating mechanism comprises a lever, a jump pin and a lock catch, the electric leakage protection module comprises a circuit board and a tripping device, and a tripping coil of the tripping device and the circuit board are connected to a tripping loop. The tripping loop comprises a first elastic piece and a second elastic piece which form a loop breakpoint, the opening and closing rotation of the lever drives the first elastic piece or the second elastic piece to generate elastic deformation in a first direction so as to connect or disconnect the loop breakpoint, and the circuit board is electrically connected with the first elastic piece and the second elastic piece so as to take electricity from the tripping loop. According to the utility model, the first elastic piece or the second elastic piece elastically deforms along with the rotation of the lever so as to control the on-off of the circuit breakpoint, and the circuit board takes electricity from the tripping circuit through the first elastic piece and the second elastic piece, so that the circuit board cannot be electrified for a long time due to the disconnection of the tripping circuit, and the burnout of the tripping device is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of low-voltage apparatus, specifically relates to a circuit breaker. BACKGROUND

[0002] The circuit breaker is a kind of switch device that can close, carry and break the current under normal circuit conditions, and close, carry and break the current under abnormal circuit conditions within a specified time, and the residual-current circuit breaker belongs to one kind of circuit breaker, is used to detect the residual current in circuit and automatically cut off circuit to protect personal safety.The existing residual-current circuit breaker has residual-current protection module, the line board is connected with the trip circuit that takes electricity from power supply line between the trip device, the controller on the line board drives the trip device to act through the trip circuit, usually, the line board takes electricity from the upper end or lower end of residual-current circuit breaker, the side of the line board that takes electricity is load side, and the side that does not take electricity is incoming line side, if reverse connection, the line board electricity end becomes power supply side, even if the moving contact breaks the circuit, but the line board is still in the energized state, and the line board is always energized and will be burned soon on the trip coil in series in the trip circuit. SUMMARY

[0003] The utility model aims at overcoming at least one defect of prior art, and provides a circuit breaker.

[0004] To achieve the above object, the utility model adopts the following technical scheme:

[0005] The utility model provides a kind of circuit breaker, including shell, the shell is equipped with at least one circuit breaker pole and residual-current protection module, the circuit breaker pole includes operating mechanism, the operating mechanism includes the lever of rotation assembly, the lever is equipped with the snap fit jump buckle and lock buckle, the residual-current protection module includes line board, mutual inductor and trip device, line board is electrically connected with mutual inductor, the trip coil of the trip device is connected with line board in trip circuit, and the operating mechanism is driven by the trip device to trip, the trip circuit includes the first elastic member and the second elastic member fixed in shell, the first elastic member and the second elastic member are spaced apart in first direction to form circuit break point, the lever is driven first elastic member or second elastic member to be elastically deformed in first direction to connect or disconnect circuit break point, and the line board is respectively electrically connected with first elastic member, second elastic member for taking electricity from trip circuit.

[0006] Preferably, at least one circuit breaker pole further includes handle mechanism, the handle mechanism is arranged side by side with lever in first direction and is rotationally arranged respectively, the first elastic member is located between the second elastic member and the handle mechanism in the first direction, the second elastic member is arranged between the residual-current protection device and the lever in the second direction, the first elastic member is driven by the lever to be close to or away from the second elastic member, and the first direction and the second direction are perpendicular to each other.

[0007] Preferably, one end of the first elastic member is fixed in the shell for electrical connection with the circuit board, and the other end of the first elastic member is connected to the lever for cooperation with the second elastic member, and the middle part of the first elastic member is spaced apart from the second elastic member and elastically deformed.

[0008] Preferably, the first elastic member comprises a first twisted part, the first twisted part is assembled in the shell, one end of the first twisted part extends outward to form a first contact part in the shape of a rod, the first contact part extends in the second direction, and the end of the first contact part is connected to the lever, the other end of the first twisted part extends outward to form a first connecting arm, the second elastic member comprises a second twisted part, one end of the second twisted part serves as a second contact part, the second contact part is spaced apart from the first contact part in the first direction to form a loop break point, the other end of the second twisted part extends outward to form a second connecting arm, and the first connecting arm and the second connecting arm are respectively electrically connected with the circuit board.

[0009] Preferably, the first elastic member comprises a first twisted part assembled in the shell, one end of the first twisted part extends outward to form a connecting arm, the end of the connecting arm is bent at least once to form a first contact part in the shape of a spiral, the first contact part is parallel to the second direction along the central axis of the first twisted part, the first contact part is connected to a connecting shaft arranged on the lever, and the other end of the first twisted part extends outward to form a first connecting arm.

[0010] The second elastic member comprises a conductive elastic sheet, the middle part of the conductive elastic sheet is bent to space apart the two ends of the conductive elastic sheet, one end of the conductive elastic sheet serves as a second contact part, the second contact part is spaced apart from the first contact part in the first direction to form a loop break point, the other end of the conductive elastic sheet serves as a second connecting arm, and the first connecting arm and the second connecting arm are respectively electrically connected with the circuit board.

[0011] Preferably, the first elastic member comprises an elastic sheet, one end of the elastic sheet serves as a first contact part, the end of the first contact part is clamped on the lever, the other end of the elastic sheet serves as a first connecting arm and is fixed to the shell, and the middle part of the elastic sheet is bent to form an angle between the first contact part and the first connecting arm.

[0012] The second elastic member comprises a plate-shaped elastic sheet, one end of the plate-shaped elastic sheet serves as a second contact part and is spaced apart from the first contact part to form a loop break point, the other end of the plate-shaped elastic sheet serves as a second connecting arm, and the first connecting arm and the second connecting arm are respectively electrically connected with the circuit board.

[0013] Preferably, the lever is provided with an assembly part, the assembly part is provided with a clamping groove, and the end of the first contact part is clamped in the clamping groove of the assembly part.

[0014] Preferably, the leakage protection module is provided with a partition plate between the adjacent circuit breaker pole, the partition plate is provided with a mounting space for connecting the circuit breaker pole and the leakage protection module, and the first elastic member and the second elastic member are matched in the mounting space.

[0015] Preferably, the mounting space comprises a first mounting groove and a second mounting groove, and the first mounting groove and the second mounting groove are respectively used for limiting the deformation track of the first elastic member and the second elastic member.

[0016] Preferably, both ends of the first elastic member and / or the second elastic member are fixed in the shell, one side of the lever facing the leakage protection module is provided with a protruding part, when the lever is closed and rotated, the middle part of the first elastic member or the middle part of the second elastic member is pushed by the protruding part, so that the first elastic member and the second elastic member are in elastic contact to connect the circuit breaker point.

[0017] Preferably, the lever comprises a body, the body is provided with a jump buckle shaft and a lock buckle shaft, the jump buckle and the lock buckle are respectively rotationally assembled on the jump buckle shaft and the lock buckle shaft, the body is further provided with a first mounting hole and a second mounting hole, the first mounting hole is side by side with the jump buckle shaft and corresponds to the first elastic member, and the second mounting hole is used for rotationally assembling the lever in the shell.

[0018] The circuit breaker of the utility model, the first elastic member or the second elastic member is elastically deformed with the rotation of the lever to control the on-off of the circuit breaker point, the elastic member is used to form the circuit breaker point, the moving distance is small, and the contact pressure during connection can be ensured, the circuit board takes electricity from the trip circuit through the first elastic member and the second elastic member, so that the circuit board cannot be powered for a long time due to the disconnection of the trip circuit, and the trip device is prevented from being burnt out.

[0019] In addition, the first elastic member is located between the handle mechanism and the second elastic member, the lever can conveniently drive the first elastic member nearby, the space inside the circuit breaker is fully utilized, too much internal space is avoided, and the normal work of the remaining parts is avoided.

[0020] In addition, the first elastic member and the second elastic member can be springs, torsional springs or elastic sheets, and have the advantages of simple structure, convenient assembly and low cost.

[0021] In addition, the partition plate separating the leakage protection module and the circuit breaker pole provides the first elastic member and the second elastic member with assembly and matching positions, improves the matching stability, and avoids interfering with the normal work of other parts. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a structure schematic view of the circuit breaker of the utility model;

[0023] Figure 2 It is a structure schematic view of the handle mechanism, the operating mechanism and the moving contact in the utility model.

[0024] Figure 3 is a structural schematic view of the lever in the utility model;

[0025] Figure 4 is a cooperation schematic view of the first elastic member and the second elastic member in the first embodiment of the utility model;

[0026] Figure 5 is a structural schematic view of the first elastic member, the second elastic member and the operating mechanism in the first embodiment of the utility model;

[0027] Figure 6 is a structural schematic view of the first elastic member in the first embodiment of the utility model;

[0028] Figure 7 is a structural schematic view of the second elastic member in the first embodiment of the utility model;

[0029] Figure 8 is a structural schematic view of the partition plate in the first embodiment of the utility model Figure 1 ;

[0030] Figure 9 is a structural schematic view of the partition plate in the first embodiment of the utility model Figure 2 ;

[0031] Figure 10 is a cooperation schematic view of the first elastic member and the second elastic member in the second embodiment of the utility model;

[0032] Figure 11 is a structural schematic view of the first elastic member, the second elastic member and the operating mechanism in the second embodiment of the utility model;

[0033] Figure 12 is a structural schematic view of the first elastic member in the second embodiment of the utility model;

[0034] Figure 13 is a structural schematic view of the second elastic member in the second embodiment of the utility model;

[0035] Figure 14 is a structural schematic view of the partition plate in the second embodiment of the utility model Figure 1 ;

[0036] Figure 15 is a structural schematic view of the partition plate in the second embodiment of the utility model Figure 2 ;

[0037] Figure 16 is a cooperation schematic view of the first elastic member and the second elastic member in the third embodiment of the utility model;

[0038] Figure 17is a structural schematic view of the first elastic member, the second elastic member and the operating mechanism in the third embodiment of the utility model;

[0039] Figure 18 is a structural schematic view of the first elastic member in the third embodiment of the utility model;

[0040] Figure 19 is a structural schematic view of the second elastic member in the third embodiment of the utility model;

[0041] Figure 20 is a structural schematic view of the assembly part in the third embodiment of the utility model;

[0042] Figure 21 is a structural schematic view of the partition plate in the third embodiment of the utility model Figure 1 ;

[0043] Figure 22 is a structural schematic view of the partition plate in the third embodiment of the utility model Figure 2 ;

[0044] Reference signs: 1 - shell, 10 - partition plate, 101 - first installation groove, 102 - second installation groove, 2 - circuit breaker pole, 21 - handle mechanism, 22 - operating mechanism, 221 - lever, 2211 - jump buckle shaft, 2212 - lock buckle shaft, 2213 - first installation hole, 2214 - second installation hole, 222 - jump buckle, 223 - lock buckle, 224 - connecting shaft, 225 - assembly part, 2251 - clamping groove, 40 - contact support, 41 - movable contact, 5 - leakage protection module, 51 - first elastic member, 510 - first twist part, 511 - first contact part, 512 - first wiring arm, 52 - second elastic member, 520 - second twist part, 521 - second contact part, 522 - second wiring arm, 53 - tripping device, 531 - tripping device, 532 - push plate, 533 - indicating part. DETAILED DESCRIPTION

[0045] The following embodiments are further illustrated in combination with the accompanying drawings, and the specific implementation of the circuit breaker of the utility model is further illustrated. The circuit breaker of the utility model is not limited to the description of the following embodiments.

[0046] As Figure 1As shown, the circuit breaker includes a housing 1, within which at least one circuit breaker pole 2 is disposed. Each circuit breaker pole 2 typically includes a pair of terminals disposed at both ends of the housing 1, through which the circuit breaker is connected to a power line. Between the pair of terminals is an operating mechanism 22 and a contact mechanism. The operating mechanism 22 includes a rotatably mounted lever 221, on which a latching latch 222 and a locking latch 223 are rotatably mounted. The contact mechanism includes a cooperating moving contact 41 and a stationary contact. The moving contact 41 is connected to the lever via a contact support 40. The rod 221 is coaxially rotatably assembled and driven by the lever 221. At least one circuit breaker pole 2 is equipped with a handle mechanism 21. The handle mechanism 21 is linked to the operating mechanism 22 in the same circuit breaker pole 2. The manual operation of the handle mechanism 21 can drive the operating mechanism 22 to move the moving contact 41 closer to or away from the stationary contact, thereby realizing the closing or opening of the contact mechanism. When there are two or more circuit breaker poles 2, two adjacent circuit breaker poles 2 are arranged side by side, and the operating mechanisms 22 in the two adjacent circuit breaker poles 2 are linked to achieve synchronous operation.

[0047] The housing 1 is also equipped with a leakage current protection module, which is arranged in parallel with the circuit breaker pole 2. The leakage current protection module includes a current transformer, a circuit board and a tripping device 53. The current transformer is coupled to the power line and collects the leakage current signal on the power line and feeds it back to the controller on the circuit board. A tripping circuit is connected between the tripping device 53 and the circuit board. The tripping coil in the tripping device 53 is connected in series with the circuit board in the tripping circuit. The controller on the circuit board drives the tripping device 53 to operate through the tripping circuit. The tripping device 53 is linked with the latch 223 in the adjacent circuit breaker pole 2 to trigger the operating mechanism 22 to trip.

[0048] For ease of description, the length direction of the circuit breaker is taken as the first direction. Figure 4 , 10 The direction of the X-axis in 16), that is, the line connecting a pair of terminals is parallel to the first direction, and the thickness direction of the circuit breaker is the second direction. Figure 4 , 10 (and the Y-axis direction in 16), that is, the leakage protection module 5 and the adjacent circuit breaker pole 2 are arranged side by side in the second direction. When there are two or more circuit breaker poles 2, two adjacent circuit breaker poles 2 are arranged side by side in the second direction, and the first direction is perpendicular to the second direction.

[0049] The improvement of the application is that the trip circuit comprises a first elastic member 51 and a second elastic member 52 fixed in the shell 1, the first elastic member 51 and the second elastic member 52 are spaced apart in the first direction to form a circuit break point, the opening and closing of the lever 221 drives the first elastic member 51 or the second elastic member 52 to elastically deform in the first direction to turn on or turn off the circuit break point, and the circuit board is electrically connected with the first elastic member 51 and the second elastic member 52 respectively to take electricity from the trip circuit.

[0050] In this way, the first elastic member 51 or the second elastic member 52 elastically deforms with the rotation of the lever 221 to control the on-off of the circuit break point, the elastic member is used to form the break point, the moving distance is small, and the contact pressure can be ensured when turned on, the circuit board takes electricity from the trip circuit through the first elastic member 51 and the second elastic member 52, so that the circuit board cannot be powered for a long time due to the disconnection of the trip circuit, and the trip device 53 is prevented from being burned out.

[0051] Specifically, at least part of the first elastic member 51 and the second elastic member 52 is fixed in the shell 1, which is beneficial to the elastic deformation of the first elastic member 51 and the second elastic member 52, and facilitates the electrical connection between the first elastic member 51, the second elastic member 52 and the circuit board.

[0052] As shown in Figure 4 , 5 , 10, 11, 16 and 17, in the first direction, the first elastic member 51 is located between the second elastic member 52 and the handle mechanism 21, and in the second direction, the second elastic member 52 is arranged between the leakage protection device and the lever 221, the first elastic member 51 is driven by the lever 221 to move close to or away from the second elastic member 52, the first elastic member 51 is arranged between the handle mechanism 21 and the second elastic member 52, which facilitates the driving of the first elastic member 51 by the lever 221, fully utilizes the internal space of the circuit breaker, avoids occupying too much internal space, and interferes with the normal work of the remaining parts. Of course, the lever 221 can also drive the second elastic member 52 to move close to or away from the first elastic member 51.

[0053] Further, one end of the first elastic member 51 is fixed in the shell 1 for electrical connection with the circuit board, the other end of the first elastic member 51 is connected to the lever 221 for cooperation with the second elastic member 52, the middle part of the first elastic member 51 is spaced apart from the second elastic member 52 and elastically deforms with the driving of the lever 221, in the on state of the circuit break point, the first elastic member 51 and the second elastic member 52 will elastically deform in the first direction, which is beneficial to ensuring the contact pressure of the circuit break point.

[0054] In addition, both ends of the first elastic member 51 and / or the second elastic member 52 can be fixed in the housing 1, and the lever 221 is provided with a protrusion, when the lever 221 rotates to close, the protrusion pushes the middle part of the first elastic member 51 or the middle part of the second elastic member 52, so that the first elastic member 51 and the second elastic member 52 are in elastic contact to connect the loop breakpoint, when the lever 221 rotates to open, the first elastic member 51 or the second elastic member 52 resets, the first elastic member 51 and the second elastic member 52 are separated to disconnect the loop breakpoint, at this time the protrusion can be separated from the middle part of the first elastic member 51 or the middle part of the second elastic member 52, or the protrusion has no interaction force with the middle part of the first elastic member 51 or the second elastic member 52.

[0055] The first elastic member 51 can adopt a rod body structure, a spring or a spring sheet, etc. which is conductive and has elasticity, and the second elastic member 52 can also adopt a rod body structure, a spring or a spring sheet, etc. which is conductive and has elasticity, which has the advantages of simple structure, convenient assembly and low cost.

[0056] Preferably, as shown in Figure 8 、 9 , 14, 15, 21 and 22, the leakage protection module 5 is separated from the adjacent circuit breaker pole 2 by the partition plate 10, the partition plate 10 is provided with a mounting space for connecting the leakage protection module 5 and the circuit breaker pole 2, and the first elastic member 51 and the second elastic member 52 are matched in the mounting space, which can improve the matching stability and avoid interfering with the normal work of other components. Specifically, the mounting space includes a first mounting groove 101 and a second mounting groove 102, and the first mounting groove 101 and the second mounting groove 102 are respectively used to limit the deformation track of the first elastic member 51 and the second elastic member 52.

[0057] In combination with Figures 1-9 The first embodiment of the circuit breaker is provided.

[0058] The circuit breaker comprises a housing 1, at least one circuit breaker pole 2 and a leakage protection module 5 are arranged in the housing 1, the circuit breaker pole 2 and the leakage protection module 5 are arranged side by side in a second direction, two ends of the circuit breaker pole 2 are provided with a pair of terminal posts which are spaced apart and opposite in a first direction, an operating mechanism 22 and a contact mechanism are arranged between the pair of terminal posts, the operating mechanism 22 comprises a lever 221 which is rotatably arranged, the lever 221 is rotatably arranged with a snap-fitted trip catch 222 and a lock catch 223, the contact mechanism comprises a movable contact 41 and a static contact which are matched with each other, the movable contact 41 is coaxially arranged and drivingly matched with the lever 221 through a contact support 40, an energy storage spring is arranged between the contact support 40 and the lever 221, and the static contact is fixed in the housing 1; each circuit breaker pole 2 can be further provided with an arc extinguishing system, and the arc extinguishing system is matched with the arc extinguishing contact mechanism to extinguish the arc generated by the breaking; in the embodiment, only a handle mechanism 21 is arranged in one of the circuit breaker poles 2, the handle mechanism 21 is arranged side by side with the lever 221 in the same circuit breaker pole in the first direction, the handle mechanism 21 is rotatably arranged and connected with the lever 221 and the trip catch 222 arranged on the lever 221 through a linkage rod, and an operating part of the handle mechanism 21 extends out of a handle hole of the housing 1 and is used for manually operating the opening and closing of the circuit breaker pole 2.

[0059] The leakage protection module 5 comprises a circuit board and a tripping device 53, a mutual inductor is connected to the circuit board, the mutual inductor is coupled to a power supply line of the circuit breaker, the mutual inductor collects a leakage current on the power supply line, and a tripping circuit is connected between the circuit board and the tripping device 53; the tripping device 53 can adopt the prior art, that is, the tripping device 53 comprises a tripping device 531, a push plate 532 and an indicating piece 533, the tripping device 531 is an electromagnetic tripping device 531, a tripping coil of the tripping device 531 is connected to the tripping circuit, when the mutual inductor collects the leakage current and feeds back to a controller of the circuit board, the controller of the circuit board drives the tripping device 531 to act, a moving iron core of the tripping device 531 drives the push plate 532 to rotate, the push plate 532 and the indicating piece 533 which are limited to each other are separated, the push plate 532 drives the lock catch 223 in the adjacent circuit breaker pole 2 to be unlocked and rotated, so as to realize the tripping of the operating mechanism 22, the circuit breaker is opened and powered off, and at the same time, the indicating piece 533 is popped up to indicate that a leakage fault occurs.

[0060] In addition, the leakage protection module 5 further comprises a test button and a leakage detection circuit which is turned on or turned off by the test button, when the leakage detection circuit is turned on, the mutual inductor senses an analog leakage current generated in the leakage detection circuit, and then a controller of the circuit board drives the tripping device 53 to act.

[0061] Further, as shown in FIG. 1, the circuit breaker further comprises a handle mechanism 21 which is arranged in one of the circuit breaker poles 2, the handle mechanism 21 is rotatably arranged with a snap-fitted trip catch 222 and a lock catch 223, the handle mechanism 21 is rotatably arranged and connected with the lever 221 and the trip catch 222 arranged on the lever 221 through a linkage rod, and an operating part of the handle mechanism 21 extends out of a handle hole of the housing 1 and is used for manually operating the opening and closing of the circuit breaker pole 2. Figures 4-7As shown in the figure, the trip circuit includes a first elastic member 51 and a second elastic member 52, in the first direction, the first elastic member 51 and the second elastic member 52 are spaced opposite to form a circuit break point, and the first elastic member 51 is located between the handle mechanism 21 and the second elastic member 52, in the second direction, the second elastic member 52 is arranged between the leakage protection device and the lever 221, and the first elastic member 51 is driven by the lever 221 to approach or move away from the second elastic member 52, so as to turn on or turn off the trip circuit, the first elastic member 51 and the second elastic member 52 are respectively electrically connected with the circuit board, so that the circuit board is powered from the trip circuit.

[0062] In the embodiment, as shown in the figure, Figure 4 , 5 One end of the first elastic member 51 is fixed in the shell 1, and the other end is connected to the lever 221, preferably, the first elastic member 51 is arranged along the second direction, and the other end of the first elastic member 51 is inserted into the lever 221, the middle part of the first elastic member 51 is spaced opposite to the second elastic member 52, and the other end of the second elastic member 52 is used for cooperation with the first elastic member 51, when the lever 221 rotates for opening and closing, the middle part of the first elastic member 51 elastically deforms along the first direction, so that part of the first elastic member 51 elastically abuts against the second elastic member 52, thereby turning on the circuit break point.

[0063] A first elastic member 51 and a second elastic member 52 applied to the embodiment are provided, the first elastic member 51 is formed as a whole by an elastic conductive rod body, and the second elastic member 52 is formed by a spring segment, which has the advantages of simple structure and low cost. As shown in the figure, Figures 4-6 The first elastic member 51 is integrally formed by a conductive rod body, the first elastic member 51 includes a first twisted part 510, and the first elastic member 51 is arranged in the shell 1 through the first twisted part 510, Figure 6 The first twisted part 510 is an open ring, one end of the first twisted part 510 extends outward to form a first contact part 511, the first contact part 511 is a straight rod in the figure, the first contact part 511 is arranged along the second direction as a whole, and the end of the first contact part 511 is connected to the lever 221, preferably, the end of the first contact part 511 is inserted into the lever 221, the other end of the first twisted part 510 extends outward to form a first wiring arm 512, the first wiring arm 512 is electrically connected with the circuit board through a wire, or the first wiring arm 512 is directly inserted into the circuit board.

[0064] As shown in the figure, Figure 4 , 5As shown in Figure 7, the second elastic element 52 is a conductive spring. The second elastic element 52 includes a second twisted portion 520. One end face of the second twisted portion 520 serves as a second contact portion 521. The second contact portion 521 and the first contact portion 511 are spaced apart and opposite each other in a first direction to form a circuit break. Since one end of the second twisted portion 520 serves as the second contact portion 521, the contact area between the first contact portion 511 and the second contact portion 521 is guaranteed, and the two generate elastic deformation along the first direction when in contact. The other end of the second twisted portion extends outward to form a second connecting arm 522. Figure 7 In the circuit, the second connector arm 522 is a rod structure with one end conductive. The second connector arm 522 is electrically connected to the circuit board through a wire, or it can be directly plugged into the circuit board.

[0065] like Figures 3-5 As shown, the lever 221 applied in this embodiment is similar to the prior art, reducing the need for modifications to existing parts and facilitating the modification of existing products; Figure 3 In the lever 221, there is a body. On the same surface of the body, there are a snap-lock shaft 2211 and a locking shaft 2212 protruding. Snap-lock 222 and locking shaft 223 are rotatably mounted on snap-lock shaft 2211 and locking shaft 2212, respectively. The body also has a first mounting hole 2213 and a second mounting hole 2214. The first mounting hole 2213 is arranged side by side with snap-lock shaft 2211. The first mounting hole 2213 is opposite to the first elastic member 51 and is used to insert into the first elastic member 51. The specifications of the first mounting hole 2213 are preferably matched with the area of ​​the first elastic member 51 used for connection. That is, the specifications of the first mounting hole 2213 are matched with the end of the first contact part 511. The second mounting hole 2214 is a through hole. The lever 221 is rotatably mounted in the outer casing 1 through the second mounting hole 2214.

[0066] Preferably, a partition 10 is provided between the leakage current protection module 5 and the adjacent circuit breaker pole 2. The partition 10 has an installation space connecting the leakage current protection module 5 and the adjacent circuit breaker pole 2. The first elastic member 51 and the second elastic member 52 are located within the installation space and cooperate with each other within the installation space. Preferably, the installation space includes a first installation slot 101 and a second installation slot 102 that are independent of each other, such as... Figure 8 , 9As shown, the first mounting slot 101 and the second mounting slot 102 are both strip-shaped slots opened along the first direction, the first contact part 511 is arranged in the first mounting slot 101 in the second direction and deformed in the first mounting slot 101, and the second elastic member 52 is arranged in the second mounting slot 102 and can be elastically deformed in the second mounting slot 102. It can also be understood that the first mounting slot 101 and the second mounting slot 102 can limit the deformation tracks of the first elastic member 51 and the second elastic member 52 respectively. In addition, the partition plate 10 is also provided with a linkage hole for driving the push plate 532 to trip the operating mechanism 22, and an indicating hole for arranging an indicating member 533. The structures of the linkage hole and the indicating hole can adopt the prior art. When the number of the circuit breaker poles 2 is more than two, the adjacent two circuit breaker poles 2 can also be separated by another partition plate 10.

[0067] In combination Figures 1-3 , 10-15, a second embodiment of the circuit breaker is provided.

[0068] The circuit breaker comprises a housing 1, a circuit breaker pole 2 and a leakage protection module 5 are arranged in the housing 1, and the circuit breaker pole 2 and the leakage protection module 5 are arranged side by side in the second direction. The circuit breaker pole 2 comprises the same wiring terminal, contact mechanism and arc extinguishing system as the first embodiment, as shown in Figure 10 、 11 As shown, the operating mechanism 22 is the same as the first embodiment except that the first mounting hole 2213 of the lever 221 is provided with a connecting shaft 224. The leakage protection module 5 comprises the same mutual inductor, circuit board and tripping device 53 as the first embodiment. A tripping circuit is connected between the circuit board and the tripping device 53. The loop break point of the tripping circuit is formed by the first elastic member 51 and the second elastic member 52 spaced apart in the first direction. The first elastic member 51 and the second elastic member 52 are only fixedly connected to the housing 1 at one end, but the structures of the first elastic member 51 and the second elastic member 52 in this embodiment are different from those in the first embodiment.

[0069] As shown in Figures 10-13 , the first elastic member 51 is formed as a whole by an electrically conductive rod body, and the second elastic member 52 is formed by an electrically conductive metal spring. The first elastic member 51 is integrally formed by an electrically conductive rod body. The first elastic member 51 comprises a first twisted part 510 assembled in the housing 1. One end of the first twisted part 510 extends outward to form a connecting arm, Figures 10-12 , the connecting arm is a rod body with an arc. The first contact part 511 is formed by bending the end of the connecting arm at least once to form a spiral. The first contact part 511 is arranged on the lever 221 through the connecting shaft 224. The other end of the first twisted part 510 extends outward to form a first wiring arm 512, Figure 11In the embodiment, the first contact part 511 is parallel to the second direction with the axis of the first elastic member 51, and when the first elastic member 51 is arranged in the housing 1, the first elastic member 51 can be located at the gap between the leakage protection module 5 and the circuit breaker pole 2 in the second direction.

[0070] As shown in Figure 10 , 11 and 13, the second elastic member 52 comprises a conductive spring, the middle part of the conductive spring is bent, so that the two ends of the conductive spring are spaced apart to form a V-shaped structure, one end of the conductive spring serves as the second contact part 521 which is spaced apart from the first contact part 511 in the first direction to form a loop break point, the other end of the conductive spring serves as the second wiring arm 522, Figure 10 , 11 and 13, the length of the second contact part 521 is greater than the length of the second wiring arm 522, so that the end of the second contact part 521 can be located on the moving track of the first contact part 511, the second wiring arm 522 is fixedly connected with the housing 1 and can be electrically connected with the circuit board through a wire.

[0071] In addition, as shown in Figure 14 , 15 , in the embodiment, a partition plate 10 is also arranged between the leakage protection module 5 and the adjacent circuit breaker pole 2, and the first elastic member 51 and the second elastic member 52 are located in the mounting space as in the first embodiment, and the mounting space also comprises the first mounting groove 101 and the second mounting groove 102, wherein when the first elastic member 51 is deformed, the first contact part 511 moves in the first mounting groove 101, the movement track of the first contact part 511 is limited by the first mounting groove 101, the connecting arm of the first elastic member 51 moves in the gap between the partition plate 10 and the circuit breaker pole 2, the second elastic member 52 is correspondingly assembled in the second mounting groove 102, and the second contact part 521 of the second elastic member 52 is located on the moving track of the first contact part 511, as shown in Figure 14 , 15 , the mounting space is a strip-shaped groove, the first mounting groove 101 and the second mounting groove 102 are in communication in the first direction on the side facing the circuit breaker pole 2, so as to facilitate the contact or disconnection of the first contact part 511 and the second contact part 521 in the mounting area, and the first mounting groove 101 and the second mounting groove 102 are separated from each other in the first direction on the side facing the leakage protection module 5, so as to facilitate the fixed assembly of the second elastic member 52.

[0072] A third embodiment of the circuit breaker is provided in combination with Figures 1-3 , 16-22.

[0073] The circuit breaker comprises a housing 1, a circuit breaker pole 2 and a leakage protection module 5 are arranged in the housing 1, and the circuit breaker pole 2 and the leakage protection module 5 are arranged side by side in the second direction, the circuit breaker pole 2 comprises the same terminal, contact mechanism and arc extinguishing system as the second embodiment, the operating mechanism 22 is provided with a fitting part 225 (see Figure 16 、 17 and 20) in addition to the lever 221, and the rest of the structure is the same as the second embodiment, the side of the fitting part 225 facing the leakage protection module 5 is provided with a clamping groove 2251, and the first elastic part 51 is connected to the fitting part 225 through the clamping groove 2251; of course, the clamping groove 2251 for clamping the first elastic part 51 can also be directly formed on the lever 221.

[0074] The leakage protection module 5 comprises the same transformer, circuit board and tripping device 53 as the first embodiment, a tripping circuit is connected between the circuit board and the tripping device 53, the loop break point of the tripping circuit is also formed by the first elastic part 51 and the second elastic part 52 being spaced apart in the first direction, and the first elastic part 51 and the second elastic part 52 are only fixedly connected to the housing 1 at one end, but the structure of the first elastic part 51 and the second elastic part 52 in the embodiment is different from that of the above two embodiments.

[0075] As shown in Figures 16-18 , the first elastic part 51 comprises a plate-shaped elastic sheet, one end of the elastic sheet is a first contact part 511, the end of the first contact part 511 is clamped on the lever 221, that is, the end of the first contact part 511 is inserted into the clamping groove 2251 of the fitting part 225 or the clamping groove 2251 of the lever 221, the other end of the elastic sheet is fixedly connected to the housing 1 as a first wiring arm 512, and the middle part of the elastic sheet is bent to form an angle between the first contact part 511 and the first wiring arm 512;

[0076] As shown in Figure 16 、 17 and 19, the second elastic part 52 comprises a plate-shaped elastic sheet, one end of the plate-shaped elastic sheet is a second contact part 521 which forms a loop break point in spaced relation with the first contact part 511, preferably, the side of the second contact part 521 facing the first contact part 511 is provided with a protruding area, which is beneficial to increase the contact surface of the first contact part 511 and the second contact part 521, the other end of the plate-shaped elastic sheet is fixedly connected to the housing 1 as a second wiring arm 522, and the first wiring arm 512 and the second wiring arm 522 are respectively electrically connected to the circuit board.

[0077] In the embodiment, as shown in Figure 21 and 22As shown, a partition 10 is also arranged between the circuit breaker pole 2 and the leakage protection module 5, and the partition 10 is provided with a mounting space, and the mounting space also includes a first mounting slot 101 and a second mounting slot 102. In this embodiment, the assembly part 225 and the first elastic part 51 inserted into the assembly part 225 slide in the first mounting slot 101, the movement track of the first contact part 511 in the first elastic part 51 is limited by the first mounting slot 101, and the second elastic part 52 is arranged in the second mounting slot 102, Figure 21 、 22 In this embodiment, the first mounting slot 101 is an arc-shaped slot, and the second mounting slot 102 is a rectangular groove, and the second mounting slot 102 provides a certain space for the swing of the second contact part 521 in the second elastic part 52.

[0078] A fourth embodiment (not shown) of the circuit breaker is provided.

[0079] The circuit breaker includes a housing 1, and the circuit breaker pole 2 and the leakage protection module 5 are arranged in the housing 1, and the circuit breaker pole 2 and the leakage protection module 5 are arranged side by side in the second direction. The circuit breaker pole 2 includes the same wiring terminal, contact mechanism and arc extinguishing system as the first embodiment, and the rest of the structure in the operating mechanism 22 is the same as the first embodiment, and the lever 221 is provided with the same trip buckle shaft 2211, lock buckle shaft 2212 and second mounting hole 2214 as the first embodiment. Different from the first embodiment, the lever 221 no longer has the first mounting hole 2213, but has a protruding part on the side of the lever 221 facing the leakage protection module 5, that is, the protruding part protrudes towards the direction where the first elastic part 51 is arranged.

[0080] The leakage protection module 5 includes the same circuit board and tripping device 53 as the first embodiment, and a tripping circuit is connected between the circuit board and the tripping device 53, and the circuit break point of the tripping circuit is formed by the first elastic part 51 and the second elastic part 52 arranged opposite to each other in the first direction. Different from the first embodiment, both ends of the first elastic part 51 and / or the second elastic part 52 are fixedly arranged in the housing 1, and when the lever 221 is closed, the middle part of the first elastic part 51 or the middle part of the second elastic part 52 is pushed by the protruding part. In this process, the first elastic part 51 or the second elastic part 52 is elastically deformed in the first direction, so that the first elastic part 51 and the second elastic part 52 are in elastic contact, thereby connecting the circuit break point.

[0081] In the embodiment, the first elastic member 51 is preferably an elastic rod body with electric conductivity, in the first direction, the first elastic member 51 is located between the handle mechanism 21 and the second elastic member 52, the first elastic member 51 is arranged in the second direction and both ends of the first elastic member 51 are fixed in the shell 1, the middle part of the first elastic member 51 can have a certain arc, in the second direction, the loop breakpoint formed by the first elastic member 51 and the second elastic member 52 is located between the leakage protection module 5 and the adjacent circuit breaker pole 2, when the lever 221 is closed and rotated, the convex part pushes the middle part of the first elastic member 51 to deform, so that the middle part of the first elastic member 51 elastically abuts against the second elastic member 52, thereby connecting the loop breakpoint, when the lever 221 is opened and rotated, with the recovery of the middle part of the first elastic member 51, the first elastic member 51 is separated from the second elastic member 52, and the loop breakpoint is connected.

[0082] The second elastic member 52 of the embodiment can adopt the same spring as the first embodiment, and the assembly mode can also be the same as the first embodiment, at this time, the second elastic member 52 is fixed at only one end in the shell 1, of course, the second elastic member 52 can also adopt the assembly mode that both ends are fixed in the shell 1, and will not affect the connection and disconnection of the loop breakpoint.

[0083] Of course, the second elastic member 52 can also be driven by the lever 221 to deform, so that the second elastic member 52 moves towards or away from the first elastic member 51.

[0084] It should be noted that in the description of the utility model, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings or the orientation or positional relationship usually placed in use, and are only for the convenience of description, and cannot be understood as indicating that the device or element referred to must have a specific orientation, therefore, cannot be understood as limiting the utility model. In addition, the terms "first", "second", "third" and the like are only used for distinguishing description, and cannot be understood as indicating relative importance.

[0085] The above content is a further detailed description of the utility model in combination with the specific preferred embodiments, and the specific implementation of the utility model cannot be limited to these descriptions. For ordinary skilled persons in the technical field to which the utility model belongs, without departing from the concept of the utility model, a number of simple deductions or substitutions can also be made, all of which should be regarded as falling within the protection scope of the utility model.

Claims

1. A circuit breaker comprising a housing (1) provided with at least one circuit breaker pole (2) and a leakage protection module (5), the circuit breaker pole (2) comprising an operating mechanism (22) including a pivotally assembled lever (221) provided with a snap-fitted trip dog (222) and a latch (223), the leakage protection module (5) comprising a circuit board, a transformer and a trip device (53), the circuit board and the transformer being electrically connected, a trip coil of the trip device (53) being connected with the circuit board in a trip circuit, the trip device (53) driving the operating mechanism (22) to trip, characterized in that the trip circuit comprising a first elastic member (51) and a second elastic member (52) fixed in the housing (1), the first elastic member (51) and the second elastic member (52) being spaced apart in a first direction to form a circuit breaking point, the opening and closing rotation of the lever (221) driving the first elastic member (51) or the second elastic member (52) to elastically deform in the first direction to connect or disconnect the circuit breaking point, the circuit board being electrically connected with the first elastic member (51) and the second elastic member (52) respectively for taking electricity from the trip circuit.

2. The circuit breaker of claim 1, wherein: The at least one circuit breaker pole (2) further comprises a handle mechanism (21) disposed side by side with the lever (221) in the first direction and respectively rotatable, the first elastic member (51) being located between the second elastic member (52) and the handle mechanism (21) in the first direction, the second elastic member (52) being disposed between the leakage protection device and the lever (221) in a second direction, the lever (221) driving the first elastic member (51) to move close to or away from the second elastic member (52), the first direction being perpendicular to the second direction.

3. The circuit breaker of claim 2, wherein: One end of the first elastic member (51) is fixed in the housing (1) for electrical connection with the circuit board, the other end of the first elastic member (51) is connected to the lever (221) for cooperation with the second elastic member (52), the middle part of the first elastic member (51) is spaced apart from the second elastic member (52) and elastically deformed.

4. The circuit breaker of claim 3, wherein: The first elastic member (51) comprises a first twisted part (510) assembled in the housing (1), one end of the first twisted part (510) extends outward to form a rod-shaped first contact part (511), the first contact part (511) extends in the second direction, the end of the first contact part (511) is connected to the lever (221), the other end of the first twisted part (510) extends outward to form a first wiring arm (512), the second elastic member (52) comprises a second twisted part (520), one end of the second twisted part (520) serves as a second contact part (521), the second contact part (521) is spaced apart from the first contact part (511) in the first direction to form a circuit breaking point, the other end of the second twisted part (520) extends outward to form a second wiring arm (522), the first wiring arm (512) and the second wiring arm (522) are respectively electrically connected with the circuit board.

5. The circuit breaker of claim 3, wherein: The first elastic member (51) comprises a first twisted part (510) assembled in the shell (1), one end of the first twisted part (510) extends outward to form a connecting arm, the end of the connecting arm is bent at least once to form a helical first contact part (511), the first contact part (511) is parallel to the second direction with the central axis of the first twisted part (510), the first contact part (511) is connected to the connecting shaft (224) arranged on the lever (221), the other end of the first twisted part (510) extends outward to form a first wiring arm (512), The second elastic member (52) comprises a conductive elastic sheet, the middle part of the conductive elastic sheet is bent to make the two ends of the conductive elastic sheet spaced apart from each other, one end of the conductive elastic sheet serves as a second contact part (521) and forms a loop breakpoint with the first contact part (511) in the first direction, the other end of the conductive elastic sheet serves as a second wiring arm (522), and the first wiring arm (512) and the second wiring arm (522) are respectively electrically connected with the circuit board.

6. The circuit breaker of claim 3, wherein: The first elastic member (51) comprises an elastic sheet, one end of the elastic sheet serves as a first contact part (511), the end of the first contact part (511) is clamped on the lever (221), the other end of the elastic sheet serves as a first wiring arm (512) and is fixed to the shell (1), and the middle part of the elastic sheet is bent to make the first contact part (511) and the first wiring arm (512) form an included angle. The second elastic member (52) comprises a plate-shaped elastic sheet, one end of the plate-shaped elastic sheet serves as a second contact part (521) and forms a loop breakpoint with the first contact part (511), the other end of the plate-shaped elastic sheet serves as a second wiring arm (522), and the first wiring arm (512) and the second wiring arm (522) are respectively electrically connected with the circuit board.

7. The circuit breaker of claim 6, wherein: The lever (221) is provided with an assembly part (225), the assembly part (225) is provided with a clamping groove (2251), and the end of the first contact part (511) is clamped in the clamping groove (2251) of the assembly part (225).

8. The circuit breaker of any one of claims 1-7, wherein: The leakage protection module (5) and the adjacent circuit breaker pole (2) are provided with a partition plate (10), the partition plate (10) is provided with a mounting space for communicating the circuit breaker pole (2) and the leakage protection module (5), and the first elastic member (51) and the second elastic member (52) are matched in the mounting space.

9. The circuit breaker of claim 8, wherein: The mounting space comprises a first mounting groove (101) and a second mounting groove (102), and the first mounting groove (101) and the second mounting groove (102) are respectively used for limiting the deformation track of the first elastic member (51) and the second elastic member (52).

10. The circuit breaker of claim 1, wherein: The two ends of the first elastic member (51) and / or the second elastic member (52) are fixed in the shell (1), one side of the lever (221) facing the leakage protection module (5) is provided with a protruding part, when the lever (221) is closed and rotated, the middle part of the first elastic member (51) or the middle part of the second elastic member (52) is pushed by the protruding part, so that the first elastic member (51) and the second elastic member (52) are elastically contacted to connect the loop breakpoint.

11. The circuit breaker of claim 1, wherein: The lever (221) comprises a body provided with a jump buckle shaft (2211) and a lock buckle shaft (2212), the jump buckle (222) and the lock buckle (223) are respectively rotationally assembled on the jump buckle shaft (2211) and the lock buckle shaft (2212), and the body is further provided with a first mounting hole (2213) and a second mounting hole (2214); the first mounting hole (2213) is side-by-side with the jump buckle shaft (2211) and corresponds to the first elastic member (51); and the second mounting hole (2214) is used for rotationally assembling the lever (221) in the shell (1).

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