Wire terminal and plug-in circuit breaker

Abstract

The application relates to the field of low-voltage electrical apparatus, in particular to a wiring terminal which comprises a wiring screw, a wire pressing plate, a nut part and a wiring plate; the wiring screw is in threaded connection with the nut part; the wire pressing plate is arranged between the nut part and the screw cap of the wiring screw, is arranged obliquely relative to the wiring plate, is fixedly arranged, one end of the wire pressing plate is limited, and the other end is arranged oppositely to the wiring plate to form a space for connecting a wire; the wiring screw is screwed to make the nut part move along the wiring screw in the axial direction, meanwhile, the nut part drives the wire pressing plate to lift the one end matched with the wiring plate to press the wire tightly between the wire pressing plate and the wiring plate; the wiring terminal is simple in structure, convenient in operation and high in wiring reliability. The application also relates to a plug-in circuit breaker comprising the wiring terminal, and the wiring operation is simple and high in reliability.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of low-voltage electrical apparatus, in particular to a terminal, and to a plug-in circuit breaker comprising the terminal. BACKGROUND

[0002] Ordinary small circuit breakers usually adopt cage terminals, and the wire insertion direction is perpendicular to the force application direction of the terminal. This method occupies a large height space due to the vertical movement of the terminal, and is not suitable for circuit breakers in communication cabinets which are increasingly miniaturized. Therefore, screwless terminals are generally used for wiring in components in communication cabinets. Such terminals usually only rely on the clamping force provided by the spring sheet to ensure the reliability of the wiring. However, as the current increases and the cross-sectional area of the wire increases, the clamping force required by the spring sheet also increases, resulting in the increasing stiffness required by the spring sheet. In the case of large-current wire connection, the operation force required for wiring is large, resulting in time-consuming and laborious wiring for users, and the material cost of the terminal is also increasing. SUMMARY

[0003] The present application aims to overcome the defects of the prior art, and provides a terminal which is simple in structure, easy to operate, and high in wiring reliability. The present application also provides a plug-in circuit breaker comprising the terminal, which is simple to operate and high in reliability.

[0004] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0005] A terminal comprising a terminal screw 2e, a wire pressing plate 2g, a nut member 2f, and a terminal plate 2j; the terminal screw 2e is threadedly connected with the nut member 2f; the wire pressing plate 2g is arranged between the nut member 2f and the nut of the terminal screw 2e, and is arranged obliquely relative to the terminal plate 2j; the terminal plate 2j is fixedly arranged, and one end of the wire pressing plate 2g is limited and the other end is arranged opposite to the terminal plate 2j to form a space for connecting the wire;

[0006] The terminal screw 2e is screwed, so that the nut member 2f moves axially along the terminal screw 2e, and at the same time the nut member 2f lifts the end of the wire pressing plate 2g cooperating with the terminal plate 2j to press the wire tightly between the wire pressing plate 2g and the terminal plate 2j.

[0007] Preferably, the nut member 2f is limited and cooperated with a terminal assembly cavity accommodating the terminal, so as to prevent the nut member 2f from rotating. The terminal screw 2e is screwed, and the nut member 2f moves reciprocally along the axial direction of the terminal screw 2e.

[0008] Preferably, the terminal further comprises a terminal mounting shaft 2h and a terminal reset torsion spring 2i; one end of the terminal 2g is provided with a terminal shaft sleeve 20g, the terminal shaft sleeve 20g is sleeved on the terminal mounting shaft 2h, the terminal mounting shaft 2h is fixedly arranged on the terminal assembly cavity, the first terminal reset torsion spring 2i is sleeved on the terminal mounting shaft 2h, one end is connected with the cavity wall of the terminal assembly cavity, and the other end is connected with the terminal 2g.

[0009] Preferably, the terminal 2g comprises a terminal shaft sleeve 20g, a first connecting portion 21g and a first terminal portion 22g, one end of the first connecting portion 21g is connected with the terminal shaft sleeve 20g, the other end is connected with one end of the first terminal portion 22g, and the other end of the first terminal portion 22g is matched with the terminal plate 2j; the nut member 2f comprises a nut member first portion 20f which is threadedly connected with the terminal screw 2e and a nut member second portion 21f which is connected with one end of the nut member first portion 20f by bending, the nut member first portion 20f is arranged opposite to the first connecting portion 21g and is used in cooperation, and the nut member second portion 21f is arranged opposite to the first terminal portion 22g and is used in cooperation.

[0010] Preferably, the included angle α between the first connecting portion 21g and the first terminal portion 22g is greater than the included angle β between the nut member first portion 20f and the nut member second portion 21f.

[0011] Preferably, the terminal 2g is in an overall L-shaped structure, the width of the first terminal portion 22g is greater than the width of the first connecting portion 21g, and the length of the terminal shaft sleeve 20g is the same as the width of the first connecting portion 21g; the terminal screw 2e is arranged at the gap of the L-shaped structure of the terminal 2g.

[0012] Preferably, the terminal 2g comprises a terminal first portion 200g, a terminal second portion 210g and a terminal third portion 220g, the terminal first portion 200g is sleeved on the terminal screw 2e through the first portion opening hole arranged thereon, the terminal second portion 210g is provided with a second portion waist-shaped hole, the terminal second portion 210g is sleeved on the terminal screw 2e through the second portion waist-shaped hole, one end of the terminal first portion 200g is connected with one end of the terminal second portion 210g by bending, the other end of the terminal second portion 210g is connected with the terminal third portion 220g by bending, the other end of the terminal third portion 220g is matched with the terminal plate 2j, and the terminal second portion 210g and the terminal third portion 220g are arranged obliquely relative to the terminal plate 2j as a whole; the nut member 2f comprises a nut member first portion 20f which is threadedly connected with the terminal screw 2e and a nut member second portion 21f which is connected with the nut member first portion 20f by bending, the nut member first portion 20f is arranged opposite to the terminal second portion 210g and is used in cooperation, and the nut member second portion 21f is arranged opposite to the terminal third portion 220g and is used in cooperation.

[0013] Preferably, the included angle a1 between the second portion 210g of the press-in plate and the third portion 220g of the press-in plate is greater than the included angle β between the first portion 20f of the nut member and the second portion 21f of the nut member; and the connection between the first portion 200g of the press-in plate and the second portion 210g of the press-in plate is in an arc shape.

[0014] Preferably, the wiring board 2j is provided with a plurality of transverse grooves or transverse ribs arranged side by side on the side facing the press-in plate 2g, and the extending direction of the transverse grooves or transverse ribs is perpendicular to the direction of insertion of the wires.

[0015] The plug-in circuit breaker comprises the wiring terminal.

[0016] Preferably, the plug-in circuit breaker comprises a circuit breaker housing and at least one protection pole, the circuit breaker housing comprises at least one protection pole assembly cavity, each protection pole comprises an operating button 1d, an operating mechanism 3 arranged in the protection pole assembly cavity and driven by the operating button 1d, a protection mechanism 4 driven in cooperation with the operating mechanism 3, an arc extinguishing system 5, a first incoming terminal 110, a first outgoing terminal 11, a moving contact 61 connected to the operating mechanism 3, and a stationary contact 62 used in cooperation with the moving contact 61; the first outgoing terminal 11 is the wiring terminal.

[0017] One end of the operating button 1d is inserted into the circuit breaker housing, the operating button 1d and the first outgoing terminal 11 are arranged at one end of the circuit breaker housing, and the first incoming terminal 110 is arranged at the other end of the circuit breaker housing; the arc extinguishing system 5 is arranged in the middle of the protection pole assembly cavity and on the side of the first incoming terminal 110, the operating mechanism 3 is arranged between the operating button 1d and the arc extinguishing system 5, and the protection mechanism 4 is arranged between the first outgoing terminal 11 and the arc extinguishing system 5 and on the side of the operating mechanism 3.

[0018] When the plug-in circuit breaker is in the closed state and the operating mechanism 3 is in the locked state, if a short-circuit fault or an overload fault occurs, the protection mechanism 4 drives the operating mechanism 3 to trip, the plug-in circuit breaker trips and the operating mechanism 3 enters the tripped state, pulling the operating button 1d to move it in the opening direction, driving the operating mechanism 3 to return to the locked state, and the plug-in circuit breaker enters the opening state.

[0019] Preferably, the operating mechanism 3 comprises a U-shaped connecting rod 35, an operating handle 30, a contact support rod 31, a trip 32, a lock 36, a lock return spring 37, and a main pull spring 33.

[0020] The operating handle 30 is pivotally arranged on the circuit breaker housing, one end of the operating handle 30 is connected with the operating button 1d through the U-shaped connecting rod 35, the other end is rotatably connected with one end of the contact supporting rod 31, the other end of the contact supporting rod 31 is provided with the movable contact 61; the jump buckle 32 is pivotally arranged on the circuit breaker housing, the middle part is connected with one end of the contact supporting rod 31 provided with the movable contact 61 through the main pull spring 33; the lock buckle 36 is rotatably arranged in the middle part, one end is connected with the circuit breaker housing through the lock buckle reset spring 37, the other end is drivingly matched with the protection mechanism 4 and is lockingly matched with the other end of the jump buckle 32.

[0021] Preferably, the protection mechanism 4 comprises a magnetic yoke 40 and a bimetallic strip 42, the magnetic yoke 40 is arranged on one side of the lock buckle 36, the bimetallic strip 42 is arranged in the middle part of the magnetic yoke 40 and is located between the magnetic yoke 40 and the lock buckle 36, one end of the bimetallic strip 42 is fixedly arranged and is electrically connected with the first outgoing terminal 11, the other end is drivingly matched with the lock buckle 36 and is electrically connected with the movable contact 61;

[0022] When the plug-in circuit breaker is in the closed state and a short-circuit fault occurs, the lock buckle 36 is attracted to swing in the direction of the magnetic yoke 40, and the lock buckle cooperation with the jump buckle 32 is released; when the plug-in circuit breaker is in the closed state and an overload fault occurs, the bimetallic strip 42 drives the lock buckle 36 to swing in the direction of the magnetic yoke 40, and the lock buckle cooperation with the jump buckle 32 is released.

[0023] Preferably, the middle part of the lock buckle 36 is rotatably arranged on one end of the magnetic yoke 40, one end of the lock buckle 36 is connected with the circuit breaker housing through the lock buckle reset spring 37, the other end is oppositely arranged with the magnetic yoke 40; one end of the bimetallic strip 42 is fixedly arranged and is electrically connected with the first outgoing terminal 11 through the first conductive plate 2b, the other end is electrically connected with the contact supporting rod 31 through the soft connection 63, and the static contact 62 is electrically connected with the first incoming terminal 110.

[0024] Preferably, the circuit breaker housing is further provided with an auxiliary wire dismounting hole, the auxiliary wire dismounting hole is arranged on one side of the wire connecting screw 2e and is oppositely arranged with the wire pressing plate 2g.

[0025] The wire terminal of the application, the wire pressing plate gives the pressure to the wire between the wire pressing plate and the wire connecting plate, mainly including the pressure generated by the deformation of the wire pressing plate itself and the pressure given to the wire by the nut through the wire pressing plate, compared with the existing wire terminal which only relies on the wire pressing plate to press the wire, the wire connection is more reliable.

[0026] The plug-in circuit breaker of the application comprises the wire terminal, and the wire connection is more convenient and reliable. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of the plug-in circuit breaker of the application, which at least shows the appearance structure of the plug-in circuit breaker;

[0028] Figure 2 is a structural diagram of the neutral pole of the plug-in circuit breaker of the present application;

[0029] Figure 3 is a structural diagram of the protective pole of the plug-in circuit breaker of the present application;

[0030] Figure 4 is another structural diagram of the protective pole of the plug-in circuit breaker of the present application;

[0031] Figure 5 is a structural diagram of the first embodiment of the operating mechanism of the present application, when the plug-in circuit breaker is in the open state;

[0032] Figure 6 is a structural diagram of the first embodiment of the operating mechanism of the present application, when the plug-in circuit breaker is in the closed state;

[0033] Figure 7 is a structural diagram of the first embodiment of the operating mechanism of the present application, when the plug-in circuit breaker is in the tripped state;

[0034] Figure 8 is a structural diagram of the second embodiment of the operating mechanism of the present application, when the plug-in circuit breaker is in the closed state;

[0035] Figure 9 is a structural diagram of the second embodiment of the operating mechanism of the present application, when the plug-in circuit breaker is in the open state;

[0036] Figure 10 is an exploded view of the locking mechanism of the present application;

[0037] Figure 11 is another exploded view of the locking mechanism of the present application;

[0038] Figure 12 is a structural diagram of the indicating member of the present application, at least showing the indicating member horizontal arm and the indicating member vertical arm;

[0039] Figure 13 is a structural diagram of the indicating member of the present application, at least showing the indicating member track shaft;

[0040] Figure 14 is a structural diagram of the first locking member of the present application, at least showing the first protrusion, the first driven protrusion and the second driven protrusion;

[0041] Figure 15 is a structural diagram of the first locking member of the present application, at least showing the locking member spring limiting slot and the first track slot;

[0042] Figure 16is a structural schematic diagram of the locking mechanism of the application, at this time the plug-in circuit breaker is in the open state;

[0043] Figure 17 is a structural schematic diagram of the locking mechanism of the application, at this time the plug-in circuit breaker is in the open state;

[0044] Figure 18 is a structural schematic diagram of the locking mechanism of the application, at this time the plug-in circuit breaker is in the open state;

[0045] Figure 19 is a structural schematic diagram of the first embodiment of the terminal of the application;

[0046] Figure 20 is a structural schematic diagram of the first embodiment of the terminal of the application;

[0047] Figure 21 is a structural schematic diagram of the first embodiment of the terminal of the application;

[0048] Figure 22 is a structural schematic diagram of the second embodiment of the terminal of the application;

[0049] Figure 23 is a structural schematic diagram of the second embodiment of the terminal of the application;

[0050] Figure 24 is a structural schematic diagram of the second embodiment of the terminal of the application;

[0051] Figure 25 is a structural schematic diagram of the third embodiment of the terminal of the application;

[0052] Figure 26 is a structural schematic diagram of the third embodiment of the terminal of the application;

[0053] Figure 27 is a structural schematic diagram of the third embodiment of the terminal of the application, at least showing the positional relationship and connection relationship of the terminal screw, the nut member, the wire pressing plate and the wire pressing plate mounting shaft;

[0054] Figure 28 is a structural schematic diagram of the nut member of the terminal of the third embodiment of the application;

[0055] Figure 29 is a structural schematic diagram of the wire pressing plate of the terminal of the third embodiment of the application;

[0056] Figure 30 is a structural schematic diagram of the wire pressing plate of the terminal of the third embodiment of the application. DETAILED DESCRIPTION

[0057] The application will be further described in the following embodiments with reference to the accompanying drawings. Figures 1-30 The plug-in circuit breaker of the present application is not limited to the description of the following embodiments.

[0058] The plug-in circuit breaker of the present application comprises a circuit breaker housing and at least one protection pole, the circuit breaker housing comprises at least one protection pole assembly cavity, the protection pole assembly cavity is matched with the protection pole one by one; each of the protection poles comprises an operation button 1d, an operation mechanism 3 arranged in the protection pole assembly cavity and driven by the operation button 1d, a protection mechanism 4 driven by the operation mechanism 3, an arc extinguishing system 5, a first incoming line terminal 110, a first outgoing line terminal 11, a moving contact 61 connected with the operation mechanism 3, and a stationary contact 62 used in cooperation with the moving contact 61.

[0059] It should be noted that the plug-in circuit breaker of the present application can be configured as a single-pole circuit breaker (i.e. a circuit breaker with only one protection pole), a two-pole circuit breaker with one protection pole, a two-pole circuit breaker with two protection poles, a three-pole circuit breaker with three protection poles, a four-pole circuit breaker with three protection poles, or a four-pole circuit breaker with four protection poles, according to needs.

[0060] Preferably, as shown in Figure 2 and 3 , one end of the operation button 1d is inserted into the circuit breaker housing, the operation button 1d and the first outgoing line terminal 11 are arranged at one end of the circuit breaker housing, and the first incoming line terminal 110 is arranged at the other end of the circuit breaker housing; the arc extinguishing system 5 is arranged in the middle of the protection pole assembly cavity and on the side of the first incoming line terminal 110, the operation mechanism 3 is arranged between the operation button 1d and the arc extinguishing system 5, and the protection mechanism 4 is arranged between the first outgoing line terminal 11 and the arc extinguishing system 5 and on the side of the operation mechanism 3. The layout of the protection poles of the plug-in circuit breaker of the present application is more compact, which significantly reduces the volume of the plug-in circuit breaker, is conducive to saving the internal space of the communication cabinet, and conforms to the miniaturization development trend of the communication cabinet. Specifically, as shown in the direction from left to right in Figures 2-3 , the protection mechanism 4 and the operation mechanism 3 are arranged side by side, the protection mechanism 4 occupies about 1 / 4 of the width of the circuit breaker housing, and the operation mechanism 3 occupies about 3 / 4 of the width of the circuit breaker housing; the arc extinguishing system 5 is arranged below the protection mechanism 4 and the operation mechanism 3 and occupies about 3 / 5 of the width of the circuit breaker housing.

[0061] Preferably, as shown in Figure 6 , the plug-in circuit breaker is in a closed state, the operation mechanism 3 is in a locked state, when a short-circuit fault or an overload fault occurs, the protection mechanism 4 drives the operation mechanism 3 to trip, the plug-in circuit breaker trips, and the operation mechanism 3 enters a tripped state (as shown in Figure 7As shown), pulling the operation button 1d moves it in the opening direction, driving the operation mechanism 3 back to the latching state, and the plug-in circuit breaker enters the opening state (as shown). Figure 5 (As shown). Further, as... Figures 3-7 As shown, the operating mechanism 3 includes a U-shaped connecting rod 35, an operating handle 30, a contact support rod 31, a trip latch 32, a locking latch 36, a locking return spring 37, and a main tension spring 33. The operating handle 30 is pivotally mounted on the circuit breaker housing. One end of the operating handle 30 is driven and connected to the operating button 1d via the U-shaped connecting rod 35, and the other end is rotatably connected to one end of the contact support rod 31. The other end of the contact support rod 31 is provided with a moving contact 61. One end of the trip latch 32 is pivotally mounted on the circuit breaker housing, and the middle part is connected to the end of the contact support rod 31 with the moving contact 61 via the main tension spring 33. The locking latch 36 is rotatably mounted in the middle, with one end connected to the locking return spring 37, and the other end locked and engaged with the other end of the trip latch 32 and driven by the protection mechanism 4. Furthermore, one end of the locking latch 36 is connected to the circuit breaker housing via the locking return spring 37.

[0062] Preferred, such as Figure 8 As shown, when the plug-in circuit breaker is in the closed state, and a short-circuit fault or overload fault occurs, the protection mechanism 4 drives the operating mechanism 3 to operate, causing the plug-in circuit breaker to enter the open state (e.g., Figure 9 As shown), after troubleshooting, press the operation button 1d to move it in the closing direction, driving the operating mechanism 3 to operate, and the plug-in circuit breaker enters the closing state. Further, as... Figure 3 , 8 As shown in Figure 9, the operating mechanism 3 includes a U-shaped connecting rod 35, an operating handle 30, a contact support rod 31, a trip latch 32, a locking latch 36, a locking latch return spring 37, a main tension spring 33, and a trip latch return spring 38. The operating handle 30 is pivotally mounted on the circuit breaker housing. One end of the operating handle 30 is driven and connected to the operating button 1d via the U-shaped connecting rod 35, and the other end is rotatably connected to one end of the contact support rod 31. The other end of the contact support rod 31 is provided with a moving contact 61. One end of the trip latch 32 is pivotally mounted on the circuit breaker housing, and the middle part is connected to the end of the contact support rod 31 with the moving contact 61 via the main tension spring 33. The latch 36 is rotatably mounted in the middle, with one end connected to the circuit breaker housing via a latch return spring 37, and the other end driven by the protection mechanism 4 and latched by the trip latch 32; one end of the trip latch return spring 38 is connected to the circuit breaker housing, and the other end is connected to the trip latch 32; when the plug-in circuit breaker is in the closed state, and a short circuit or overload fault occurs, the protection mechanism 4 drives the latch 36 to release the latch 32 from the trip latch 32, causing the plug-in circuit breaker to trip. The trip latch return spring 38 drives the trip latch 32, causing the trip latch 32 and the latch 36 to re-lock, and the plug-in circuit breaker enters the open state.

[0063] Preferred, such asFigures 3-9 As shown in the drawings, the protection mechanism 4 comprises a magnetic yoke 40 and a bimetallic strip 42, the magnetic yoke 40 is arranged at one side of the latch 36, the bimetallic strip 42 is arranged at the middle of the magnetic yoke 40 and between the magnetic yoke 40 and the latch 36, one end of the bimetallic strip 42 is fixedly arranged and electrically connected with the first outgoing terminal 11, the other end is drivingly matched with the latch 36 and electrically connected with the movable contact 61; when the plug-in circuit breaker is in the closed state and a short-circuit fault occurs, the latch 36 swings to the direction of the magnetic yoke 40 under the attraction, and the latch cooperation with the jump pin 32 is released; when the plug-in circuit breaker is in the closed state and an overload fault occurs, the bimetallic strip 42 bends to drive the latch 36 to swing to the direction of the magnetic yoke 40, and the latch cooperation with the jump pin 32 is released. The protection mechanism 4 of the present application has the functions of short-circuit protection and overload protection, and has a simple and compact structure, which can effectively reduce the required assembly space while reliably completing the protection function, and is conducive to the miniaturization trend of the plug-in circuit breaker.

[0064] Preferably, as shown in the drawings, Figures 1-4 As shown in the drawings, the plug-in circuit breaker of the present application further comprises at least two auxiliary signal terminals which are plugged and connected with external circuits; the movable contact 61 is electrically connected with the first outgoing terminal 11, the static contact 62 is electrically connected with the first incoming terminal 110, each auxiliary signal terminal is electrically connected with the first outgoing terminal 11, and at least one auxiliary signal terminal is in series with the first outgoing terminal 11 and has a signal processing element. Further, the signal processing element comprises at least one diode. Further, the plug-in circuit breaker of the present application further comprises a second incoming terminal 100 and a second outgoing terminal 10, the second incoming terminal 100 and the first incoming terminal 110 are arranged side by side at one end of the circuit breaker housing, the second outgoing terminal 10 and the first outgoing terminal 11 are arranged side by side at the other end of the plug-in circuit breaker, and the two auxiliary signal terminals are arranged side by side between the first incoming terminal 110 and the second incoming terminal 100. The plug-in circuit breaker of the present application uses the movable / static contact to generate auxiliary signals, which saves the space and cost of installing auxiliary contacts or similar accessories, is conducive to simplifying the structure of the circuit breaker, and meets the miniaturization trend of the plug-in circuit breaker; and the auxiliary signal terminal outputs signals, which can be used to judge the opening / closing state of the plug-in circuit breaker, for example, to realize remote monitoring.

[0065] Preferably, as shown in the drawings, Figures 10-18As shown in the drawings, the plug-in circuit breaker of the present application, one end of the operation button 1d is inserted into the circuit breaker housing, which is the inner end of the button, the other end of the operation button 1d protrudes outside the circuit breaker housing, which is the outer end of the button; the operation button 1d comprises an indicating element slot arranged in the middle thereof and an indicating hole 12d arranged on the outer end of the button, the indicating hole 12d communicates with one end of the indicating element slot; the plug-in circuit breaker further comprises an indicating element 7, one end of which is provided with a closing indicating surface 70 and an opening indicating surface 71 which cooperate with the indicating hole 12d respectively; when the plug-in circuit breaker is in the opening state, the opening indicating surface 71 is arranged opposite to the indicating hole 12d, pressing the operation button 1d to move it in the closing direction, at the same time, the indicating element 7 moves integrally in the indicating element slot, after the plug-in circuit breaker enters the closing state, the closing indicating surface 70 is arranged opposite to the indicating hole 12d, pulling the operation button 1d to move it in the opening direction, at the same time, the indicating element 7 moves integrally in the indicating element slot, after the plug-in circuit breaker enters the opening state, the opening indicating surface 71 is arranged opposite to the indicating hole 12d.

[0066] Further, the moving direction of the operation button 1d is perpendicular to the moving direction of the indicating element 7 in the indicating element slot.

[0067] Further, as shown in the drawings, Figure 10 and 12 The operation button 1d further comprises an indicating element sliding groove 100d arranged on a pair of side walls of the indicating element slot respectively, the extending direction of the indicating element sliding groove 100d is perpendicular to the moving direction of the operation button 1d; the indicating element 7 further comprises two indicating element sliding platforms 72 arranged on a pair of side surfaces thereof respectively, the indicating element sliding platforms 72 are slidingly arranged in the indicating element sliding groove 100d.

[0068] Further, as shown in the drawings, Figure 10 , 11 and 13, the indicating element 7 further comprises an indicating element rail shaft 75 arranged at the other end thereof; the circuit breaker housing is provided with an indicating element rail slot, the indicating element rail shaft 75 is slidingly arranged in the indicating element rail slot, when the operation button 1d is pressed / pulled, the indicating element rail slot drives the indicating element 7 to move integrally in the indicating element slot through the indicating element rail shaft 75, so that the closing indicating surface 70 / opening indicating surface 71 is arranged opposite to the indicating hole 12d.

[0069] The indicating piece 7 of the plug-in circuit breaker is inserted into the indicating piece slot arranged in the operation button 1d, and the indicating piece 7 occupies a small space, which is beneficial to the miniaturization design of the circuit breaker, the closing indicating surface 70 and the opening indicating surface 71 of the indicating piece 7 can be arranged opposite to the indicating hole 12d respectively, and the user can visually observe and quickly judge the opening / closing state of the circuit breaker through the indicating hole 12d, and the indicating piece moves as a whole in the indicating piece slot to realize the switching of the closing indicating surface and the opening indicating surface displayed in the indicating hole, the action of the indicating piece is more accurate and has a small error, the closing indicating surface or the opening indicating surface can fully fill the indicating hole, the simultaneous display of the closing indicating surface and the opening indicating surface in the indicating hole is avoided, the situation that the user makes a mistake in judgment is avoided, the electrical safety of the user is improved, the indicating piece sliding groove 100d cooperates with the indicating piece sliding platform 72 to limit the movement path of the indicating piece 7, and the reliability of the indicating result is ensured.

[0070] As shown in Figures 1-4 , it is one embodiment of the plug-in circuit breaker.

[0071] The plug-in circuit breaker comprises a circuit breaker shell and at least one protection pole, the circuit breaker shell comprises at least one protection pole assembly cavity, and the protection pole assembly cavity is matched with the protection pole in one-to-one mode; each protection pole comprises an operation button 1d, an operation mechanism 3 arranged in the protection pole assembly cavity and connected with the operation button 1d in a driving mode, a protection mechanism 4 matched with the operation mechanism 3 in a driving mode, an arc extinguishing system 5, a first incoming line terminal 110, a first outgoing line terminal 11, a moving contact 61 connected with the operation mechanism 3, and a stationary contact 62 matched with the moving contact 61; one end of the operation button 1d is inserted into the circuit breaker shell, the operation button 1d and the first outgoing line terminal 11 are arranged at one end of the circuit breaker shell, and the first incoming line terminal 110 is arranged at the other end of the circuit breaker shell; the arc extinguishing system 5 is arranged in the middle of the protection pole assembly cavity and located at the side of the first incoming line terminal 110, the operation mechanism 3 is arranged between the operation button 1d and the arc extinguishing system 5, and the protection mechanism 4 is arranged between the first outgoing line terminal 11 and the arc extinguishing system 5 and located at the side of the operation mechanism 3.

[0072] Specifically, as shown in Figures 1-2 , the plug-in circuit breaker is a two-pole circuit breaker, which comprises one protection pole and one neutral pole, the protection pole is an L pole, and the neutral pole is an N pole; the plug-in circuit breaker further comprises a circuit breaker shell composed of a front cover 1c, a base 1b and a rear cover 1a, the front cover 1c and the base 1b enclose a protection pole assembly cavity matched with the protection pole in one-to-one mode, and the base 1b and the rear cover 1a enclose a neutral pole assembly cavity matched with the neutral pole; the circuit breaker shell comprises an upper side 101 and a lower side 102, a front side 105 and a rear side 106, and a left side 103 and a right side 104. Figures 3-4As shown, the lower end of the operation button 1d is inserted into the circuit breaker housing. The operation button 1d and the first outgoing terminal 11 are located at the upper end of the circuit breaker housing, the first incoming terminal 110 is located at the lower end of the circuit breaker housing, the arc extinguishing system 5 is located in the middle of the protective electrode assembly cavity and above the first incoming terminal 110, the operation mechanism 3 is located between the operation button 1d and the arc extinguishing system 5, and the protection mechanism 4 is located between the first outgoing terminal 11 and the arc extinguishing system 5 and to the left of the operation mechanism 3.

[0073] Preferred, such as Figures 1-2 As shown, the neutral pole also includes a second incoming terminal 100 and a second outgoing terminal 10. The second incoming terminal 100 and the first incoming terminal 110 are arranged side by side at the lower end of the circuit breaker housing, and the second outgoing terminal 10 and the first outgoing terminal 11 are arranged side by side at the upper end of the circuit breaker housing. The second incoming terminal 100 is electrically connected to the second outgoing terminal 10 through a second conductive plate 2a. Specifically, as... Figure 1 As shown, the first incoming terminal 110 and the second incoming terminal 100 are respectively located on the right and left sides of the lower end of the circuit breaker housing; the first outgoing terminal 11 and the second outgoing terminal 10 are both located to the left of the operation button 1d.

[0074] Preferred, such as Figure 2 As shown, the first input terminal 110 and the second input terminal 100 each include a first elastic element 2c. Each first elastic element 2c includes a first spring connecting plate and two oppositely arranged first spring clamping plates. The two first spring clamping plates are respectively bent and connected to both ends of the first spring connecting plate. Each first spring clamping plate has a "<" structure, and the two first spring clamping plates are generally X-shaped.

[0075] like Figures 3-7 As shown, this is the first embodiment of the operating mechanism 3 of the plug-in circuit breaker of the present invention.

[0076] The operating mechanism 3 of the first embodiment comprises a U-shaped connecting rod 35, an operating handle 30, a contact support rod 31, a jump buckle 32, a lock buckle 36, a lock buckle reset spring 37 and a main pull spring 33; the operating handle 30 is pivotally arranged on the circuit breaker shell, one end of the operating handle 30 is connected with the operating button 1d through the U-shaped connecting rod 35, and the other end is rotatably connected with one end of the contact support rod 31, and the other end of the contact support rod 31 is provided with a movable contact 61; one end of the jump buckle 32 is pivotally arranged on the circuit breaker shell, and the middle part is connected with one end of the contact support rod 31 provided with the movable contact 61 through the main pull spring 33; the middle part of the lock buckle 36 is rotatably arranged, one end is connected with the lock buckle reset spring 37, and the other end is drivingly connected with the protection mechanism 4 and is lockingly connected with the other end of the jump buckle 32. Further, one end of the reset spring 37 is connected with one end of the lock buckle 36, and the other end is connected with the circuit breaker shell. Specifically, the reset spring 37 can be a torsion spring or a straight cylinder spring.

[0077] Further, as shown in Figures 3-7 , the jump buckle 32 is a U-shaped structure (see Figure 6 ), comprising a jump buckle first arm 32a and a jump buckle second arm 32b arranged opposite to each other, and the bottom of the U-shaped structure of the jump buckle 32 is arranged close to the end of the operating handle 30 connected with the contact support rod 31, one end of the jump buckle first arm 32a is pivotally arranged, the other end is connected with one end of the jump buckle second arm 32b, and the other end of the jump buckle second arm 32b is lockingly connected with the lock buckle 36.

[0078] Further, as shown in Figures 3-7 , the contact support rod 31 is in an overall arc structure, one end is provided with a support rod rotating shaft 311 rotatably connected with the operating handle 30, and the other end is provided with a movable contact 61 (see Figure 5 ), the movable contact 61 comprises a movable contact plate 610 connected with the contact support rod 31 and a movable contact point 611 arranged at one end of the movable contact plate 610, and the other end of the movable contact plate 610 is connected with the main pull spring 33. Further, the contact support rod 31 is further provided with an arc separation plate 34 (see Figure 3 ), when the plug-in circuit breaker is in the off state, the arc separation plate 34 enters between the movable contact 61 and the static contact 62, and when the plug-in circuit breaker is in the on state, the arc separation plate 34 moves out of the movable contact 61 and the static contact 62.

[0079] Further, as shown in Figures 5-7As shown, the operating mechanism 3 further comprises a linkage 44, which comprises a linkage rod 440 and a linkage shaft 441 arranged at one end of the linkage rod 440, the linkage shaft 441 is pivotally arranged on the circuit breaker housing at both ends, and a polygonal hole 4410 is arranged in the middle of the linkage shaft 441 along the axial direction thereof, and the side of the linkage rod 440 opposite to the jump buckle 32 is provided with a linkage driven table 442; the second arm 32b of the jump buckle is provided with a linkage driven table 322 which is driven in cooperation with the linkage driven table 442; the plug-in circuit breaker comprises a plurality of protection poles, the linkage shafts 441 of the plurality of protection poles are connected through a linkage connecting shaft, and the linkage connecting shaft is matched with the polygonal hole 4410 of each linkage 44, when a certain protection pole trips, the linkage driven table 322 of the jump buckle 32 of the protection pole drives the linkage rod 440 to swing through the linkage driven table 442, the linkage rod 440 drives the linkage shaft 441 to rotate, the linkage shaft 441 drives the linkage rods 440 of other protection poles to swing through the linkage connecting shaft, and respectively knocks the lock catch 36 of each protection pole, so that each protection pole synchronously trips. Further, the linkages 44 of each protection pole can be connected through a linkage connecting shaft, or adjacent two protection poles can be connected through a linkage connecting shaft.

[0080] Specifically, as Figures 4-7The jumper 32 and the contact support rod 31 are arranged below the operating handle 30 in the shown direction. The upper end of the operating handle 30 is connected to the operating button 1d through the U-shaped connecting rod 35. The middle part of the operating handle 30 is pivotally arranged on the circuit breaker shell. The lower end of the operating handle 30 is rotatably connected to the support rod rotating shaft 311 at the upper end of the contact support rod 31. The jumper 32 is in the shape of U. The opening of the jumper 32 faces downward. The jumper 32 includes the jumper second arm 32b and the jumper first arm 32a arranged at the left and right sides of the jumper 32 respectively. The lower end of the jumper first arm 32a is pivotally arranged on the circuit breaker shell. The upper end of the jumper first arm 32a is connected to the upper end of the jumper second arm 32b. The lower end of the jumper second arm 32b is locked with the lock 36. The middle part of the jumper 32 is connected to the upper end of the moving contact plate 610 of the contact support rod 31 through the main pulling spring 33. The upper end of the contact support rod 31 is arranged on the front side of the middle part of the jumper 32. The lower end of the contact support rod 31 is provided with the moving contact 61. The moving contact 61 includes the moving contact plate 610. The lower right side of the moving contact plate 610 is provided with the moving contact 611. The upper end of the moving contact plate 610 is connected to the lower end of the main pulling spring 33. The left end of the arc separation plate 34 is rotatably connected to the lower end of the contact support rod 31. The right end of the arc separation plate 34 is matched with the moving contact 61 and the static contact 62. The arc separation plate 34 extends into the moving contact 61 and the static contact 62 when the circuit breaker is opened. The arc separation plate 34 moves out of the moving contact 61 and the static contact 62 when the circuit breaker is closed. Preferably, the support rod-arc separation plate limiting groove is arranged on the contact support rod 31. When the contact support rod 31 drives the moving contact 61 and the static contact 62 to open and close, the support rod-arc separation plate limiting groove drives the arc separation plate 34 to extend into and move out of the moving contact 61 and the static contact 62 and limits the swing amplitude of the right end of the arc separation plate 34. The lock 36 is arranged on the left side of the jumper 32. The middle part of the lock 36 is pivotally arranged. The upper end of the lock 36 is connected to the circuit breaker shell through the lock reset spring 37. The lower end of the lock 36 is locked with the lower end of the jumper second arm 32b. The linkage 44 is arranged between the lock 36 and the jumper 32. The upper end of the linkage rod 440 is pivotally arranged through the linkage shaft 441. The middle part of the linkage rod 440 is provided with the linkage driven table 442 on the right side below the linkage shaft 441. The upper left side of the jumper second arm 32b is provided with the linkage driven table 322 matched with the linkage driven table 442. Preferably, as shown in Figure 4 The operating handle 30 is pivotally arranged on the circuit breaker shell through the operating handle mounting shaft 14. Further, the two ends of the operating handle mounting shaft 14 are pivotally connected to the front cover 1c and the base 1b respectively. Further, as shown in Figures 5-7 The operating handle 30 further includes the operating handle-rod hole matched with the U-shaped connecting rod 35, the operating handle-support rod hole matched with the support rod rotating shaft 311 of the contact support rod 31, and the operating handle shaft hole matched with the operating handle mounting shaft 14. The operating handle 30 is approximately a triangle. The operating handle-rod hole, the operating handle shaft hole and the operating handle-support rod hole are arranged at the three vertices of the triangle respectively.

[0081] Preferably, as shown in Figure 4As shown, the lower end of the shackle first arm 32a of the shackle 32 is pivotally arranged on the circuit breaker housing through a shackle mounting shaft 15. Further, the two ends of the shackle mounting shaft 15 are pivotally connected with the front cover 1c and the base 1b respectively. Preferably, as shown in the figure, Figure 5 As shown, the middle part of the shackle 32 is provided with a shackle-spring connecting hole 320 connected with one end of the main pull spring 33, and the upper end of the movable contact plate 610 is provided with a movable contact plate-spring connecting hole 310. Preferably, as shown in the figure, Figure 5 As shown, the lower end of the shackle second arm 32b is in a wedge structure, and the lower end of the lock catch 36 is provided with a lock catch hole 363 matched with the lower end of the shackle second arm 32b.

[0082] As shown, Figures 8-9 It is a second embodiment of the operating mechanism 3 of the plug-in circuit breaker of the present application.

[0083] The operating mechanism 3 of the second embodiment is different from the first embodiment in that it further comprises a shackle reset spring 38, one end of which is connected with the circuit breaker housing and the other end of which is connected with the shackle 32; when the plug-in circuit breaker is in the closed state and a short-circuit fault or an overload fault occurs, the protection mechanism 4 drives the lock catch 36 and the shackle 32 to disengage, the plug-in circuit breaker trips, the shackle reset spring 38 drives the shackle 32 to rotate, so that the shackle 32 and the lock catch 36 are re-engaged, and at the same time the plug-in circuit breaker enters the open state. Further, the shackle reset spring 38 is a torsion spring, which is sleeved on a shackle reset spring shaft 380 located on one side of the shackle first arm 32a, and the two ends of the shackle reset spring shaft 380 are fixed on the circuit breaker housing respectively; the middle part of the shackle first arm 32a is provided with a shackle reset boss 323, one end of the shackle reset spring 38 is connected with the circuit breaker housing and the other end of the shackle reset spring 38 is connected with the shackle 32.

[0084] Specifically, as shown, Figures 8-9 After the lock catch 36 and the shackle 32 disengage, the shackle 32 rotates counterclockwise, the contact support rod 31 rotates clockwise, the contact support rod 31 drives the movable contact 61 to enter the tripped position, and then the shackle reset spring 38 drives the shackle 32 to rotate clockwise through the shackle reset boss 323 until the lower end of the shackle second arm 32b is re-engaged with the lock catch 36.

[0085] As shown, Figures 3-9 It is an embodiment of the protection mechanism 4 of the plug-in circuit breaker of the present application.

[0086] The protection mechanism 4 includes a magnetic yoke 40 and a bimetallic strip 42. The magnetic yoke 40 is disposed on one side of the latch 36, and the bimetallic strip 42 is disposed in the middle of the magnetic yoke 40 and located between the magnetic yoke 40 and the latch 36. One end of the bimetallic strip 42 is fixedly disposed and electrically connected to the first outgoing terminal 11, and the other end is driven to cooperate with the latch 36 and electrically connected to the moving contact 61. When the plug-in circuit breaker is in the closed state and a short circuit fault occurs, the latch 36 is attracted and swings in the direction of the magnetic yoke 40, releasing the latching cooperation with the trip latch 32. When the plug-in circuit breaker is in the closed state and an overload fault occurs, the bimetallic strip 42 drives the latch 36 to swing in the direction of the magnetic yoke 40, releasing the latching cooperation with the trip latch 32.

[0087] Specifically, such as Figures 5-9 In the indicated direction, the magnetic yoke 40 is located on the left side of the latch 36, and the bimetallic strip 42 is located in the middle of the magnetic yoke 40 and between the magnetic yoke 40 and the latch 36. The upper end of the latch 36 is fixed, the middle part is rotatable, and the lower end is opposite to the magnetic yoke 40, driving and engaging with the bimetallic strip 42 and engaging with the trip latch 32. When the plug-in circuit breaker is in the closed state and a short-circuit fault occurs, a short-circuit current flows through the bimetallic strip 42, generating a magnetic field that is strengthened by the magnetic yoke 40. The lower end of the latch 36 is attracted and swings towards the direction of the magnetic yoke 40, releasing the latch engagement with the trip latch 32. When the plug-in circuit breaker is in the closed state and an overload fault occurs, the bimetallic strip 42 heats up and bends to the left, driving the lower end of the latch 36 to swing towards the direction of the magnetic yoke 40, releasing the latch engagement with the trip latch 32.

[0088] Preferred, such as Figures 5-9 As shown, the latch 36 is rotatably mounted on one end of the magnetic yoke 40. One end of the latch 36 is connected to the circuit breaker housing via a latch return spring 37, and the other end is positioned opposite to the magnetic yoke 40. One end of the bimetallic strip 42 is fixedly mounted and electrically connected to the first outgoing terminal 11 via the first conductive plate 2b (see...). Figure 3 One end is electrically connected to the contact support rod 31 via a flexible connection 63, and the stationary contact 62 is electrically connected to the first incoming terminal 110. Furthermore, the protection mechanism 4 also includes an adjusting screw, which engages with the circuit breaker housing and has one end threadedly connected to the end of the first conductive plate 2b that is connected to the bimetallic strip 42. Adjusting the position of the bimetallic strip 42 allows for adjustment of its tripping threshold or parameters.

[0089] Specifically, such as Figures 2-9 As shown, the latch 36 is rotatably mounted on the upper end of the magnetic yoke 40. The upper end of the latch 36 is connected to the circuit breaker housing through the latch return spring 37, and the lower end is positioned opposite to the magnetic yoke 40. The upper end of the bimetallic strip 42 is electrically connected to the first outgoing terminal 11 through the first conductive plate 2b, and the lower end is electrically connected to the contact support rod 31 through the flexible connection 63. The stationary contact 62 is electrically connected to the first incoming terminal 110.

[0090] Preferably, the first conductive plate 2b is electrically connected with the contact support rod 31 through the second soft connection, and an electric circuit between the first conductive plate 2b and the contact support rod is added, so that the current flowing through the bimetallic strip is reduced when a short-circuit fault occurs in the plug-in circuit breaker with a large amperage rating, and the situation that the bimetallic strip is overheated and fails due to bearing too large current is avoided.

[0091] Preferably, as shown in Figures 3-9 , the cross section of the magnetic yoke 40 is a V-shaped structure, one end of the magnetic yoke 40 is provided with two oppositely arranged magnetic yoke support arms 400 (see Figure 6 ), and the magnetic yoke support arms 400 are provided with magnetic yoke limiting grooves 401; the lock catch 36 includes a lock catch reset end 360, a lock catch support arm 361, a lock catch body 362, a lock catch hole 363, and a lock catch driven end 364 (see Figure 5 ), the lock catch reset end 360, the lock catch body 362, and the lock catch driven end 364 are sequentially connected, each side of the connection between the lock catch reset end 360 and the lock catch body 362 is provided with a lock catch support arm 361, the lock catch driven end 364 is an L-shaped structure, one end is bent and connected with the lock catch body 362, and the other end is driven and matched with the bimetallic strip 42, the two lock catch support arms 361 are respectively arranged in the two magnetic yoke limiting grooves 401, the lock catch body 362 is oppositely arranged with the magnetic yoke 40, and the lock catch hole 363 is arranged on the lock catch body 362 and is matched with the lock catch of the lock catch 32.

[0092] Specifically, as shown in the direction of Figures 3-9 , the upper end of the magnetic yoke 40 is provided with two oppositely arranged magnetic yoke support arms 400, and the magnetic yoke support arms 400 are provided with magnetic yoke limiting grooves 401; the upper end of the lock catch body 362 is bent and connected with the lock catch reset end 360, the lower end is bent and connected with the lock catch driven end 364, the lock catch reset end 360 is bent to the right side, the lock catch driven end 364 is bent to the left side, and the lock catch body 362 is provided with a lock catch hole 363 in the middle and is oppositely matched with the magnetic yoke 40.

[0093] As shown in Figures 3-4 , it is an embodiment of the arc extinguishing system 5 of the plug-in circuit breaker of the present application.

[0094] The arc extinguishing system 5 includes an arc extinguishing chamber 50 and a movable contact arc striking plate 51 and a static contact arc striking plate 52 arranged on both sides of the arc extinguishing chamber 50 respectively; the movable contact arc striking plate 51 is matched with the movable contact 61 and is electrically connected with the first outgoing terminal 11, and the static contact arc striking plate 52 is provided with a static contact 62 at one end and is electrically connected with the first incoming terminal 110 at the other end.

[0095] Specifically, as shown in Figures 3-4As shown, the movable contact arc drawing plate 51 and the static contact arc drawing plate 52 are arranged on the left and right sides of the arc extinguishing chamber 50 respectively, the upper end of the movable contact arc drawing plate 51 is matched with the movable contact 61, and the movable contact arc drawing plate 51 is electrically connected with the first outgoing terminal 11, the upper end of the static contact arc drawing plate 52 is provided with the static contact 62, and the lower end is electrically connected with the first incoming terminal 110, and the upper end of the movable contact arc drawing plate 51 and the upper end of the static contact arc drawing plate 52 are folded towards each other.

[0096] As shown in the figure, Figures 1-4 The plug-in circuit breaker further comprises at least two auxiliary signal terminals connected with external circuit in plug-in mode, each auxiliary signal terminal is electrically connected with the first outgoing terminal 11, and at least one auxiliary signal terminal is connected with the first outgoing terminal 11 in series with a signal processing element. Further, the signal processing element comprises at least one diode. Further, the signal processing element is connected in series between each auxiliary signal terminal and the first outgoing terminal 11, or the signal processing element is connected in series between one auxiliary signal terminal and the first outgoing terminal 11, and the other auxiliary signal terminal is not provided with the signal processing element. The plug-in circuit breaker preferably adopts the latter mode, so that the plug-in circuit breaker can output direct current signal through one auxiliary signal terminal and output alternating current signal through the other auxiliary signal terminal, so that the adaptability of the plug-in circuit breaker is stronger and the demand of different application environments can be met.

[0097] It should be pointed out that the signal processing element is not limited to diode, but can also be other components that can convert alternating current signal into direct current signal. Of course, the signal processing element can also be simply increased in function according to user's needs.

[0098] Specifically, as shown in the figure, Figures 1-4 The plug-in circuit breaker comprises two auxiliary signal terminals connected with external circuit in plug-in mode, which are a first auxiliary signal terminal 12 and a second auxiliary signal terminal 13, each auxiliary signal terminal is electrically connected with the first outgoing terminal 11 through the movable contact arc drawing plate 51, and a diode is connected in series between the second auxiliary signal terminal 13 and the movable contact arc drawing plate 51. Further, as shown in the direction, Figures 1-4 The first incoming terminal 110, the second incoming terminal 100, the first auxiliary signal terminal 12 and the second auxiliary signal terminal 13 are arranged at the lower end of the plug-in circuit breaker, and the first auxiliary signal terminal 12 and the second auxiliary signal terminal 13 are arranged side by side between the first incoming terminal 110 and the second incoming terminal 100. Further, the auxiliary signal terminal can be connected with external control circuit board and other circuit structures, for example, remote monitoring can be realized.

[0099] Preferably, as shown in the figure, Figure 3 and 4As shown in the figure, each of the auxiliary signal terminals comprises a second elastic element 2d, and each second elastic element 2d comprises a second spring connecting plate and two oppositely arranged second spring clamping plates, and the two second spring clamping plates are respectively connected with the two ends of the second spring connecting plate by bending, and each second spring clamping plate is in a "<" structure, and the two second spring clamping plates are in an X-shaped structure as a whole.

[0100] Preferably, as shown in the figure, Figure 3 As shown in the figure, the plug-in circuit breaker of the application further comprises an exhaust port 16, and a first exhaust passage is further arranged in the protection pole assembly cavity, one end of the first exhaust passage is connected with the gas outlet of the arc extinguishing chamber 50 of the arc extinguishing system 5, and the other end is connected with the external environment through the exhaust port 16. Specifically, as shown in the figure, Figure 3 As shown in the figure, the exhaust port 16 is arranged on the lower end surface of the circuit breaker shell and is located between the second auxiliary signal terminal 13 and the first incoming line terminal 110.

[0101] Preferably, as shown in the figure, Figures 10-13 As shown in the figure, the plug-in circuit breaker of the application, one end of the operating button 1d is inserted into the circuit breaker shell, which is the inner end of the button, and the other end of the operating button 1d protrudes outside the circuit breaker shell, which is the outer end of the button; the operating button 1d comprises an indicating element slot arranged in the middle part thereof and an indicating hole 12d arranged on the outer end of the button, and the indicating hole 12d is connected with one end of the indicating element slot; the plug-in circuit breaker further comprises an indicating element 7 slidingly inserted into the indicating element slot, and one end of the indicating element 7 is provided with a closing indicating surface 70 and an opening indicating surface 71 which are matched with the indicating hole 12d respectively; when the plug-in circuit breaker is in the opening state, the opening indicating surface 71 is arranged opposite to the indicating hole 12d, and pressing the operating button 1d makes it move in the closing direction, and at the same time, the indicating element 7 moves as a whole in the indicating element slot, and after the plug-in circuit breaker enters the closing state, the closing indicating surface 70 is arranged opposite to the indicating hole 12d, and pulling the operating button 1d makes it move in the opening direction, and at the same time, the indicating element 7 moves as a whole in the indicating element slot, and after the plug-in circuit breaker enters the opening state, the opening indicating surface 71 is arranged opposite to the indicating hole 12d.

[0102] Preferably, the moving direction of the operating button 1d is perpendicular to the moving direction of the indicating element 7 in the indicating element slot.

[0103] Preferably, as shown in the figure, Figures 10-11 As shown in the figure, the operating button 1d further comprises an indicating element sliding groove 100d arranged on a pair of side walls of the indicating element slot respectively, and the extending direction of the indicating element sliding groove 100d is perpendicular to the moving direction of the operating button 1d; as shown in the figure, Figure 12 As shown in the figure, the indicating element 7 further comprises two indicating element sliding platforms 72 arranged on a pair of side surfaces thereof respectively, and the indicating element sliding platforms 72 are slidingly arranged in the indicating element sliding groove 100d to limit the moving path of the indicating element 7 in the indicating element sliding groove 100d.

[0104] Preferably, as shown in Figure 11 and 13 , the indicating member 7 further comprises an indicating member rail shaft 75 arranged at the other end thereof; as shown in Figure 10 , the circuit breaker housing is provided with an indicating member rail slot, the indicating member rail shaft 75 is slidingly arranged in the indicating member rail slot, the indicating member rail slot drives the indicating member 7 to move as a whole in the indicating member slot by the indicating member rail shaft 75 when the press / pull operation button 1d is pressed / pulled, so that the closing indicating surface 70 / opening indicating surface 71 is arranged opposite to the indicating hole 12d, the indicating member rail slot is an inclined rail slot, which can be linearly inclined or arcuately inclined. As another embodiment for driving the indicating member 7 to move, an inclined driving surface can be arranged on the indicating member 7, and a driving protrusion is arranged on the circuit breaker housing, so that the indicating member 7 moves horizontally relative to the operation button 1d when the press / pull operation button 1d is pressed / pulled by the cooperation of the inclined driving surface and the driving protrusion.

[0105] Further, as shown in Figure 10 , the indicating member rail slot is an inclined rail slot, which is formed by the cooperation of two relatively arranged inclined half-slots on the circuit breaker housing; when the plug-in circuit breaker is in the opening state, the indicating member rail shaft 75 is located at one end of the indicating member rail slot, which is the first end of the rail slot, and when the plug-in circuit breaker is in the closing state, the indicating member rail shaft 75 is located at the other end of the indicating member rail slot, which is the second end of the rail slot, and the first end of the rail slot is closer to the button outer end of the operation button 1d than the second end of the rail slot.

[0106] It should be noted that the closing indicating surface 70 and the opening indicating surface 71 can be of different colors, for example, the closing indicating surface is green and the opening indicating surface is red; or the closing indicating surface 70 and the opening indicating surface 71 have different text or symbol marks, for example, the closing indicating surface 70 has the word "closing" or the symbol "|", and the opening indicating surface 71 has the word "opening" or the symbol "○"; of course, the implementation forms of the two are not limited to the above two, as long as the closing indicating surface 70 and the opening indicating surface 71 can be effectively distinguished, so that the closing and opening states of the plug-in circuit breaker can be correctly indicated.

[0107] Specifically, as shown in Figure 10 and 11 , the upper end of the operation button 1d is the button outer end, and the lower end is the button inner end, the end surface of the button outer end is provided with an indicating hole 12d, and the indicating hole 12d is in communication with the upper end of the indicating member slot; the closing indicating surface 70 and the opening indicating surface 71 are arranged side by side at the upper end of the indicating member 7, the two indicating member slides 72 are arranged at the middle two sides of the indicating member 7, and the indicating member rail shaft 75 is arranged at the lower end of the indicating member 7. As shown in Figure 10As shown in the figure, the indicating member track groove is formed by two inclined half grooves in opposite arrangement, one of which is arranged on the rear cover 1a as the first half groove 10a, and the other of which is arranged on the base 1b as the second half groove 10b; the upper right end of the indicating member track groove is the first end of the track groove, and the lower left end is the second end of the track groove; when the plug-in circuit breaker is in the open state, the indicating member track shaft 75 is located at the first end of the track groove; when the plug-in circuit breaker is in the closed state, the indicating member track shaft 75 is located at the second end of the track groove; as shown in the figure, Figure 10 As shown in the figure, when the plug-in circuit breaker is in the open state, when the operation button 1d is pressed downward (i.e. the operation button 1d is moved in the closing direction), the operation button 1d is linearly moved, while the indicating member track groove is inclined from the upper right to the lower left, so that the indicating member track groove drives the indicating member 7 to move horizontally (i.e. the overall movement of the indicating member 7 in the indicating member slot) through the indicating member track shaft 75, so as to switch from the open indicating surface 71 to the closed indicating surface 70.

[0108] Preferably, as shown in the figure, Figures 10-18 The plug-in circuit breaker further comprises a locking mechanism, the locking mechanism comprising a second locking member 8 pivotally arranged in the middle portion, the second locking member 8 comprising a locking member upper end and a locking member lower end arranged at two ends thereof respectively, and the locking member lower end being provided with a second protrusion 82; when the plug-in circuit breaker is in the closed state, the operation button 1d drives the second locking member 8 to rotate through the locking member lower end, so that the second protrusion 82 protrudes outside the circuit breaker housing; when the plug-in circuit breaker is in the open state, the operation button 1d drives the second locking member 8 to rotate through the locking member upper end, so that the second protrusion 82 moves into the circuit breaker housing. Further, as shown in the figure, Figure 11 , 12 , 18, the indicating member 7 further comprises an indicating member horizontal arm 74 arranged at one end thereof; the second locking member 8 further comprises a second locking member driven part 81 arranged at the locking member upper end, and the operation button 1d drives the second locking member 8 to rotate through the drive cooperation of the indicating member horizontal arm 74 and the second locking member driven part 81, so that the second protrusion 82 moves into the circuit breaker housing. Further, as shown in the figure, Figure 11 , 12 , 17, the second locking member 8 further comprises a second locking member driven protrusion 83 arranged at the locking member lower end, and the second locking member driven protrusion 83 protrudes in the opposite direction to the second protrusion 82; when the plug-in circuit breaker is in the closed state, the indicating member horizontal arm 74 is located on one side of the second locking member driven protrusion 83 and is limitedly cooperated with the second locking member driven protrusion 83, so that the second protrusion 82 protrudes outside the circuit breaker housing.

[0109] Specifically, as shown in the figure, Figure 18As shown in the direction, the indicating member horizontal arm 74 is arranged at the lower end of the indicating member 7 and protrudes to the left side, the second locking member driven part 81 is arranged at the upper end of the second locking member 8 and protrudes to the right side, the second protrusion 82 Figure 18 The second protrusion 82 is blocked by the first locking member 9) and the second locking member driven protrusion 83 are arranged at the lower end of the second locking member 8 and protrude to the left and right sides of the second locking member 8 respectively, and the indicating member horizontal arm 74 is located below the second locking member driven part 81 and is driven in cooperation. As shown in the direction, when the plug-in circuit breaker is in the open state, the operation button 1d drives the second locking member 8 to rotate counterclockwise through the cooperation of the indicating member horizontal arm 74 and the second locking member driven part 81, and the second protrusion 82 moves into the circuit breaker housing. Figure 18 As shown in the direction, when the plug-in circuit breaker is in the closed state, the operation button 1d moves downward, and the indicating member horizontal arm 74 presses the second locking member driven protrusion 83, so that the second locking member 8 rotates counterclockwise, and the second protrusion 82 protrudes outside the circuit breaker housing. Since the indicating member horizontal arm 74 is located on the left side of the second locking member driven protrusion 83 and is limited in cooperation, the second protrusion 82 is kept protruding outside the circuit breaker housing. Figure 17

[0110] The plug-in circuit breaker of the present application keeps the second protrusion 82 of the second locking member 8 protruding outside the circuit breaker housing through the indicating member horizontal arm 74 of the indicating member 7 when the circuit breaker is in the closed state, which avoids the occurrence of electric shock when the circuit breaker is installed in the closed state, and is beneficial to improve the safety of users using electricity.

[0111] It should be pointed out that the driving of the second locking member 8 is not limited to being driven by the indicating member horizontal arm 74, but can also be driven by the operation button 1d which is similar to the indicating member horizontal arm 74.

[0112] Preferably, as shown in the direction, the locking mechanism further comprises a first locking member 9, one end of the first locking member 9 is slidingly arranged in the circuit breaker housing, and the other end is a first protrusion 90 protruding outside the circuit breaker housing; when the plug-in circuit breaker is assembled to the cavity-shaped circuit breaker assembly position, the shell of the circuit breaker assembly position extrudes the first protrusion 90, so that the first locking member 9 moves to the inside of the circuit breaker housing as a whole, and after the plug-in circuit breaker is assembled in place, the first protrusion 90 protrudes outside the circuit breaker housing and is limited in cooperation with the shell of the circuit breaker assembly position. Figures 10-11

[0113] ​​The first locking member 9 of the plug-in circuit breaker is in position limiting cooperation with the shell of the circuit breaker assembly position after the plug-in circuit breaker is assembled to the circuit breaker assembly position and assembled in place, which ensures the reliability of the plug-in circuit breaker assembly, avoids the plug-in circuit breaker from being pulled out by mistake in the closed state, and improves the power safety.

[0114] Preferably, as shown in Figures 16-18 , the lower end of the second locking member 8 is in driving cooperation with the first locking member 9; when the plug-in circuit breaker is in the open state, the pulling operation button 1d is pulled, and the operation button 1d drives the first locking member 9 to move to the inside of the circuit breaker shell as a whole through the second locking member 8, so that the first protrusion 90 is released from the position limiting cooperation with the shell of the circuit breaker assembly position. Further, as shown in Figures 14-18 , the first sliding end 90a further comprises a first driven protrusion 91 and a second driven protrusion 94; the second locking member 8 further comprises a second locking member body 84 pivotally arranged in the middle, one end of the second locking member 8 is connected to the second locking member body 84 through bending, the other end of the second locking member body 84 is provided with a second protrusion 82 and the end is in driving cooperation with the second driven protrusion 94, the second locking member driven part 81 and the second protrusion 82 respectively protrude to both sides of the second locking member body 84, and the second protrusion 82 is in driving cooperation with the first driven protrusion 91.

[0115] It should be noted that the first locking member 9 can omit the first driven protrusion 91 or the second driven protrusion 94, and any one of the two can be retained in cooperation with the second locking member 8, and of course this improvement will reduce the stability and reliability of the action of the first locking member 9.

[0116] Preferably, as shown in Figure 11 and 15 , the first locking member 9 further comprises a first sliding end 90a slidingly arranged in the circuit breaker shell, one side of the first sliding end 90a is connected to the first protrusion 90, and the other side is connected to the circuit breaker shell through a first locking member reset spring 9a, the first locking member reset spring 9a provides a force to the first locking member 9, so that the first protrusion 90 remains protruding outside the circuit breaker shell.

[0117] Specifically, as shown in the direction of Figure 16 and 17 , the upper end of the second locking member body 84 is connected to the second locking member driven part 81 through bending (connected at a right angle or approximately connected at a right angle), the second protrusion 82 is arranged at one side edge of the lower end of the second locking member body 84, and the lower end of the second locking member body 84 and the second protrusion 82 are arranged on the right side of the second driven protrusion 94 and the first driven protrusion 91 respectively; as shown in Figure 16As shown, the plug-in circuit breaker is in the open state, the operating button 1d is pulled upward, the operating button 1d drives the second locking member 8 to rotate clockwise through the cooperation of the indicating member horizontal arm 74 of the indicating member 7 and the second locking member driven part 81, and then the lower end of the second locking member main body 84 drives the first locking member 9 to move leftward (toward the circuit breaker housing) through the second driven protrusion 94 and the second protrusion 82 through the first driven protrusion 91, so that the first protrusion 90 of the first locking member 9 is released from the limiting cooperation with the housing of the circuit breaker assembly position.

[0118] Preferably, as shown in Figure 10 As shown, the circuit breaker housing is provided with a first opening 11a cooperating with the first protrusion 90 and the second protrusion 82. Specifically, as shown in Figure 1 As shown, the first opening 11a is arranged on the right side of the circuit breaker housing, and the first protrusion 90 and the second protrusion 82 respectively protrude outside the circuit breaker housing through the first opening 11a.

[0119] As shown in Figures 11-18 As shown, it is an embodiment of the locking mechanism of the plug-in circuit breaker of the present application.

[0120] As shown in Figure 10 and 11 As shown, the locking mechanism comprises a first locking member 9, a second locking member 8 and an indicating member 7; one end of the indicating member 7 is inserted into the operating button 1d, and the other end is drivingly cooperated with the second locking member 8, the middle part of the second locking member 8 is pivotally arranged, and one end is drivingly cooperated with the first locking member 9.

[0121] Preferably, as shown in Figure 10 , 11 , 14, 15, the first locking member 9 comprises first protrusions 90 and first sliding ends 90a arranged at both ends thereof respectively, one side of the first sliding end 90a is connected with the first protrusion 90, and the other side is connected with the circuit breaker housing through the first locking member reset spring 9a. Further, as shown in Figure 15 The first sliding end 90a comprises a locking member spring limiting groove 92 arranged at one side thereof, and a locking member spring limiting protrusion is further arranged in the middle part of the locking member spring limiting groove 92, one end of the first locking member reset spring 9a is inserted into the locking member spring limiting groove 92 and is sleeved on the locking member spring limiting protrusion. Further, as shown in Figure 15 One end of the first sliding end 90a is provided with a first track groove 93 cooperating with the first sliding track of the circuit breaker housing to limit the sliding path of the first sliding end 90a. Further, as shown in Figure 14As shown, the first sliding end 90a further comprises a first driven protrusion 91 and a second driven protrusion 94, the first driven protrusion 91 and the first track slot 93 are respectively arranged at two ends of the first sliding end 90a, and the second driven protrusion 94 is arranged on the upper side of the first sliding end 90a and between the first driven protrusion 91 and the first track slot 93.

[0122] Preferably, as shown in Figure 10 , 11 , 16-18, the second locking member 8 comprises a second locking member driven part 81, a second locking member body 84, a second locking member driven protrusion 83 and a second protrusion 82; the middle part of the second locking member body 84 is pivotally arranged on the circuit breaker housing through a second locking member mounting shaft 80, one end is connected to the second locking member driven part 81 by bending, and the other end is provided with the second locking member driven protrusion 83 and the second protrusion 82; the second locking member driven part 81 and the second protrusion 82 respectively protrude to two sides of the second locking member body 84, and the second locking member driven part 81 protrudes on the same side of the second locking member body 84 as the second locking member driven protrusion 83.

[0123] Specifically, as shown in Figure 10 and 11 , the second locking member 8 comprises a locking member upper end and a locking member lower end arranged at the upper end and the lower end thereof respectively, the second locking member driven part 81 is connected to the second locking member body 84 by bending (connected at a right angle or approximately connected at a right angle), forming the locking member upper end, and the second protrusion 82 and the second locking member driven protrusion 83 are both arranged at the lower end of the second locking member body 84, and the second protrusion 82 and the lower end of the second locking member body 84 form the locking member lower end; the middle part of the second locking member body 84 is provided with the second locking member mounting shaft 80, and the two ends of the second locking member mounting shaft 80 are respectively pivotally connected to the circuit breaker housing; the lower end of the second locking member body 84 is drivingly matched with the second driven protrusion 94, the second locking member driven protrusion 83 is arranged at one side edge of the lower end of the second locking member body 84 (as shown in the direction of Figure 10 , the second locking member driven protrusion 83 is arranged at the left side edge of the lower end of the second locking member body 84), and the second protrusion 82 protrudes below the lower end of the second locking member body 84 and is connected to the second locking member driven protrusion 83 (as shown in the direction of Figure 10The second locking member driven part 81 and the second locking member body 84 are integrally formed as an L-shaped structure, the second locking member driven protrusion 83 and the second protrusion 82 are integrally formed as a plate structure, and the second locking member driven part 81 and the second protrusion 82 protrude to the two sides of the second locking member body 84, respectively, the second locking member driven part 81 and the second locking member driven protrusion 83 protrude to the same side of the second locking member body 84, and the second protrusion 82 is driven and matched with the first driven protrusion 91.

[0124] Preferably, as shown in Figures 10-13 , 17-18, the indicating member 7 comprises an indicating member body 7-0, an indicating member horizontal arm 74, an indicating member rail shaft 75, two indicating member sliding platforms 72, a closing indicating surface 70 and an opening indicating surface 71; the indicating member horizontal arm 74 is arranged at one end of the indicating member body 7-0 and connected with the indicating member body 7-0 by bending, the closing indicating surface 70 and the opening indicating surface 71 are arranged side by side at the other end of the indicating member body 7-0, and the two indicating member sliding platforms 72 are arranged at the middle parts of the two sides of the indicating member body 7-0, respectively. Figure 12 Further, as shown in , the indicating member 7 further comprises an indicating member vertical arm 73, and the indicating member vertical arm 73 and the indicating member horizontal arm 74 are arranged at the same end of the indicating member body 7-0 and integrally formed as an L-shaped structure, and the indicating member vertical arm 73 is beneficial to improve the structural strength of the indicating member horizontal arm 74.

[0125] In detail, as shown in Figure 12 and 13 , the closing indicating surface 70 and the opening indicating surface 71 are arranged side by side on the upper end surface of the indicating member body 7-0, the indicating member rail shaft 75, the indicating member horizontal arm 74 and the indicating member vertical wall 73 are arranged at the lower end of the indicating member body 7-0, the indicating member horizontal arm 74 and the indicating member vertical wall 73 are arranged at the same side of the indicating member body 7-0 and integrally formed as an L-shaped structure, the indicating member rail shaft 75 is arranged at the other side of the indicating member body 7-0, and the two indicating member sliding platforms 72 are arranged at the middle parts of the two sides of the indicating member body 7-0 and located between the opening indicating surface 71 and the indicating member horizontal arm 74.

[0126] As shown in Figure 10 , the circuit breaker shell is provided with an indicating member rail groove matched with the indicating member rail shaft 75, and the indicating member rail groove is arranged obliquely, that is, the indicating member rail groove is an oblique rail groove, and the right upper end of the indicating member rail groove is inclined to the left lower end. Further, as shown in Figure 10As shown in the figure, the indicating member rail slot comprises a first vertical slot, an inclined slot and a second vertical slot, the lower end of the first vertical slot is connected with the upper right end of the inclined slot, the upper end of the second vertical slot is connected with the lower left end of the inclined slot, and the lower end of the first vertical slot is higher than the upper end of the second vertical slot. Further, as shown in the figure, Figure 10 As shown in the figure, the indicating member rail slot is composed of two inclined half slots which are oppositely matched, specifically, one inclined half slot is arranged on the rear cover 1a, and the other inclined half slot is arranged on the base 1b.

[0127] Preferably, as shown in the figure, Figure 10 As shown in the figure, the operation button 1d comprises a button body 10d and a button cap arranged at one end of the button body 10d, the button cap is provided with an indicating hole 12d in the middle, and the other end of the button body 10d is provided with an indicating member insertion slot in the middle, and each of the two side walls of the indicating member insertion slot is provided with an indicating member sliding slot 100d. Further, as shown in the figure, Figure 10 As shown in the figure, the operation button 1d further comprises a button connecting table 11d, and the button connecting table 11d is rotationally connected with one end of the U-shaped connecting rod 35.

[0128] In combination with Figures 16-18 As shown in the figure, the working principle of the locking mechanism will be described below:

[0129] As shown in the figure, Figure 16 As shown in the figure, the plug-in circuit breaker is in the open state, the operation button 1d drives the second locking member 8 to rotate clockwise through the cooperation of the indicating member horizontal arm 74 of the indicating member 7 and the second locking member driven part 81 of the second locking member 8, and the second protrusion 82 of the second locking member 8 moves into the circuit breaker shell, in this state (open state), the plug-in circuit breaker can be loaded into the circuit breaker assembly position (for example, a cabinet); as shown in the figure, Figure 18 As shown in the figure, when the plug-in circuit breaker is in the open state, the operation button 1d is continuously pulled, and the operation button 1d drives the second locking member 8 to continue to rotate clockwise through the cooperation of the indicating member horizontal arm 74 of the indicating member 7 and the second locking member driven part 81 of the second locking member 8, and the lower end of the second locking member main body 84 and the second protrusion 82 of the second locking member 8 respectively drive the second driven protrusion 94 and the first driven protrusion 91, so that the first protrusion 90 of the first locking member 9 moves into the circuit breaker shell, thereby releasing the limiting cooperation of the plug-in circuit breaker and the shell of the circuit breaker assembly position, so that the plug-in circuit breaker can be disassembled from the circuit breaker assembly position; as shown in the figure, Figure 17As shown, when the plug-in circuit breaker is in the closed state, the operating button 1d drives the indicating member horizontal arm 74 to move downward, and the indicating member horizontal arm 74 drives the second locking member 8 to rotate counterclockwise through the second locking member driven protrusion 83, so that the second protrusion 82 protrudes outside the circuit breaker housing. In this state (closed state), the second protrusion 82 protrudes outside the circuit breaker housing, and the second protrusion 82 cannot be pressed into the circuit breaker housing due to the limiting of the indicating member horizontal arm 74 to the second locking member driven protrusion 83. Therefore, when the plug-in circuit breaker is in the closed state, it cannot be assembled to the circuit breaker assembly position. When the plug-in circuit breaker is switched between the open state and the closed state, the indicating member 7 also reciprocates in the indicating member slot of the operating button 1d due to the cooperation of the indicating member track shaft 75 and the indicating member track slot, so that when the plug-in circuit breaker is closed, the closed indicating surface 70 is opposite to the indicating hole 12d (preferably, at this time, the indicating member track shaft 75 is located at the connection between the second vertical slot and the inclined slot), and when the plug-in circuit breaker is opened, the open indicating surface 71 is opposite to the indicating hole 12d (preferably, at this time, the indicating member track shaft 75 is located at the connection between the first vertical slot and the inclined slot, and continues to pull the operating button 1d, so that the indicating member track shaft 75 slides along the first vertical slot, and the second locking member 8 drives the first locking member 9 to be disengaged from the limiting cooperation with the housing of the circuit breaker assembly position).

[0130] The application further discloses a wiring terminal.

[0131] As Figures 19-24 shown, the application discloses a wiring terminal.

[0132] The wiring terminal comprises a wiring screw 2e, a wire pressing plate 2g, a nut member 2f and a wiring plate 2j. The wiring screw 2e is in threaded connection with the nut member 2f. The wire pressing plate 2g is arranged between the nut member 2f and the nut of the wiring screw, and is arranged obliquely relative to the wiring plate 2j. The wiring plate 2j is fixedly arranged, and one end of the wire pressing plate 2g is limited and the other end is arranged opposite to the wiring plate 2j to form a space for connecting wires. The wires are inserted between the wire pressing plate 2g and the wiring plate 2j, and the wiring screw 2e is screwed, so that the nut member 2f moves axially along the wiring screw 2e, and the wire pressing plate 2g is lifted at the end matched with the wiring plate 2j, so that the wires are pressed between the wire pressing plate 2g and the wiring plate 2j. Further, the nut member 2f is in limiting cooperation with a terminal assembly cavity accommodating the wiring terminal, so that the nut member 2f is prevented from rotating and can only move axially along the wiring screw 2e. The wiring screw 2e is screwed, so that the nut member 2f moves axially along the wiring screw 2e.

[0133] Specifically, as Figures 19-24The left end of the crimping plate 2g is limited in position, and the right end is arranged opposite to the terminal plate 2j and used in cooperation. The crimping plate 2g is gradually inclined downward from the left end to the right end. The left end of the crimping plate 2g is higher than the right end of the crimping plate 2g. The terminal screw 2e is screwed, the nut member 2f moves along the terminal screw 2e in the axial direction, and simultaneously the nut member 2f drives the right end of the crimping plate 2g to gradually lift up, so as to press the wire between the crimping plate 2g and the terminal plate 2j. Of course, when the wire needs to be disassembled, the terminal screw 2e is screwed, the nut member 2f moves along the terminal screw 2e in the axial direction, and the pressure between the crimping plate 2g and the wire is reduced, so as to better disassemble the wire.

[0134] Preferably, as shown in the drawings, Figures 19-24 As shown, the terminal plate 2j is provided with a plurality of transverse grooves or transverse ribs arranged side by side on the side facing the crimping plate 2g. The extension direction of the transverse grooves or transverse ribs is perpendicular to the direction of insertion of the wire.

[0135] The crimping plate 2g of the terminal of the present application provides pressure to the wire between the crimping plate 2g and the terminal plate 2j. The pressure mainly includes the pressure generated by the deformation of the crimping plate 2g itself and the pressure provided by the nut member 2f to the wire through the crimping plate 2g. Compared with the existing terminal which only relies on the crimping plate 2g to press the wire, the connection is more reliable.

[0136] It should be noted that the nut member 2f of the terminal of the present embodiment can also not be limited in position with the terminal assembly cavity accommodating the terminal, but only rely on the friction force generated by the contact between the nut member 2f and the crimping plate 2g to limit the nut member 2f from rotating with the terminal screw 2e. In addition, since the nut member 2f is a special-shaped member, the center of gravity of the nut member 2f is located at one end of the nut member 2f, which does not coincide with the axis of the terminal screw 2e, so an eccentric force is generated to limit the nut member 2f from rotating with the terminal screw 2e. In addition, the nut member 2f and the terminal screw 2e of the terminal of the present embodiment can also be fixedly connected (instead of threaded connection), and the terminal screw 2e is threadedly connected with the shell of the terminal assembly cavity. When the terminal screw 2e is screwed, the terminal screw 2e moves relative to the terminal assembly cavity, and simultaneously drives the nut member 2e to move, which can also drive the crimping plate 2g to act.

[0137] As shown in the drawings, Figures 19-21 The terminal of the present application is the first embodiment.

[0138] The terminal includes a terminal screw 2e, a wire pressing plate 2g, a nut part 2f, a terminal plate 2j, a wire pressing plate mounting shaft 2h and a wire pressing plate reset spring 2i; the terminal screw 2e is threadedly connected with the nut part 2f, the nut part 2f is limitedly matched with a terminal assembly cavity accommodating the terminal, the nut part 2f is prevented from rotating, the terminal screw 2e is screwed, and the nut part 2f reciprocally moves along the axial direction of the terminal screw 2e; the wire pressing plate 2g is arranged between the nut part 2f and the screw cap of the terminal screw, is arranged obliquely relative to the terminal plate 2j, and is fixedly arranged; one end of the wire pressing plate 2g is provided with a wire pressing plate shaft sleeve 20g, the other end is arranged opposite to the terminal plate 2j and is used in cooperation, the wire pressing plate shaft sleeve 20g is sleeved on the wire pressing plate mounting shaft 2h, both ends of the wire pressing plate mounting shaft 2h are fixed on the cavity wall of the terminal assembly cavity, and the wire pressing plate reset spring 2i is sleeved on the wire pressing plate mounting shaft 2h, one end is connected with the cavity wall of the terminal assembly cavity, and the other end is connected with the wire pressing plate 2g. The terminal of the embodiment can drive the lifted one end of the wire pressing plate 2g to fall down while the nut part 2f moves downward, and the efficiency and convenience of wire dismounting are improved.

[0139] Specifically, as shown by the arrow in Figures 19-21 , the left end of the wire pressing plate 2g is provided with the wire pressing plate shaft sleeve 20g, the right end is arranged opposite to the terminal plate 2j and is used in cooperation, the wire pressing plate 2g gradually inclines downward from the left end to the right end, and the left end of the wire pressing plate 2g is higher than the right end of the wire pressing plate 2g. As shown in Figure 20 , the gap between the right end of the wire pressing plate 2g and the terminal plate 2j is the largest at this time, the wire can be inserted between the wire pressing plate 2g and the terminal plate 2j at this time, then the terminal screw 2e is screwed, the nut part 2f moves upward along the axial direction of the terminal screw 2e, the right end of the wire pressing plate 2g is gradually lifted, the gap between the right end of the wire pressing plate 2g and the terminal plate 2j gradually becomes smaller, and the wire is pressed tightly. Figure 21 As shown in , the gap between the right end of the wire pressing plate 2g and the terminal plate 2j is the smallest at this time, and is almost 0.

[0140] Figure 21 Preferably, as shown in Figure 21 , the wire pressing plate 2g includes the wire pressing plate shaft sleeve 20g, a first connecting part 21g and a first wire pressing part 22g, one end of the first connecting part 21g is connected with the wire pressing plate shaft sleeve 20g, the other end is connected with the first wire pressing part 22g through bending, and the other end of the first wire pressing part 22g is matched with the terminal plate 2j. Specifically, as shown by the arrow in Figures 19-21 , the left end of the first connecting part 21g is connected with the wire pressing plate shaft sleeve 20g, the right end is connected with the left end of the first wire pressing part 22g through bending, and the right end of the first wire pressing part 22g is arranged opposite to the terminal plate 2j and is used in cooperation. Further, as shown by the arrow in Figures 19-21As shown, the pressure plate 2g is generally L-shaped, the width of the first pressure part 22g is greater than the width of the first connecting part 21g, and the length of the pressure plate bushing 20g is the same as the width of the first connecting part 21g; the wiring screw 2e is set at the notch of the L-shaped structure of the pressure plate 2g.

[0141] Preferred, such as Figure 20 As shown, the nut component 2f includes a first part 20f that is threadedly connected to the wiring screw 2e, and a second part 21f that is bent and connected to one end of the first part 20f. The first part 20f is disposed opposite to and cooperates with the first connecting part 21g, and the second part 21f is disposed opposite to and cooperates with the first crimping part 22g. Specifically, as... Figures 19-20 As shown, in the initial state, the second part 21f of the nut component is in contact with the first pressure line part 22g (the two are basically parallel), and the right end of the first part 20f of the nut component is in contact with the right end of the first connecting part 21g; as Figure 21 As shown, after tightening the wiring screw 2e, the first wire pressing part 22g is gradually lifted by the second part 21f of the nut component. At the same time, the second part 21f of the nut component gradually separates from the first wire pressing part 22g. Then, the first part 20f of the nut component and the first connecting part 21g cooperate to drive the first wire pressing part 22g to continue to lift.

[0142] Preferred, such as Figure 20 As shown, the angle α between the first connecting part 21g and the first pressing part 22g is greater than the angle β between the first part 20f and the second part 21f of the nut.

[0143] like Figures 22-24 The diagram shows a second embodiment of the terminal block of the present invention.

[0144] The terminal block of the present invention includes a terminal screw 2e, a pressure plate 2g, a nut 2f, and a terminal block 2j. The terminal screw 2e is threadedly connected to the nut 2f, and the nut 2f is limited in fit with the terminal assembly cavity that accommodates the terminal block, preventing the nut 2f from rotating. When the terminal screw 2e is turned, the nut 2f reciprocates along the axial direction of the terminal screw 2e. The pressure plate 2g is disposed between the nut 2f and the nut of the terminal screw, and is inclined relative to the terminal block 2j. The terminal block 2j is fixedly disposed, with one end of the pressure plate 2g being limited, and the other end being disposed opposite to and used in conjunction with the terminal block 2j. When a wire is inserted between the pressure plate 2g and the terminal block 2j, and the terminal screw 2e is turned, the nut 2f moves along the axial direction of the terminal screw 2e. At the same time, the nut 2f drives the end of the pressure plate 2g that cooperates with the terminal block 2j to lift up, pressing the wire tightly between the pressure plate 2g and the terminal block 2j.

[0145] Preferred, such as Figures 22-24As shown, the wire clamping plate 2g includes a first part 200g, a second part 210g, and a third part 220g. The first part 200g is fitted onto the wiring screw 2e through a first opening. The second part 210g has a second oblong hole, through which it is fitted onto the wiring screw 2e. One end of the first part 200g is bent and connected to one end of the second part 210g, and the other end of the second part 210g is connected to the third part 220g. The wire pressure plate is bent and connected, and the other end of the third part 220g is used in conjunction with the terminal block 2j. The second part 210g and the third part 220g of the wire pressure plate are inclined relative to the terminal block 2j. The nut 2f includes a first part 20f of the nut 2f that is threadedly connected to the terminal screw 2e and a second part 21f of the nut 2f that is bent and connected to the first part 20f. The first part 20f of the nut 2f and the second part 210g of the wire pressure plate are arranged opposite to each other and used in conjunction. The second part 21f of the nut 2f and the third part 220g of the wire pressure plate are arranged opposite to each other and used in conjunction. Further, as Figure 23 As shown, the connection between the first part 200g and the second part 210g of the pressure plate is an arc-shaped structure. The angle α1 between the second part 210g and the third part 220g of the pressure plate is greater than the angle β between the first part 20f and the second part 21f of the nut.

[0146] Specifically, such as Figures 22-24 As shown, the first part 200g and the second part 210g of the wire clamping plate are sequentially arranged between the nut and the nut 2f of the wiring screw 2e. The left end of the third part 220g of the wire clamping plate is bent and connected to the right end of the second part 210g of the wire clamping plate, and the right end of the third part 220g of the wire clamping plate is opposite to and cooperates with the wiring plate 2j; Figure 22 and 23 As shown, at this time, there is no interaction force or a very weak interaction force between the nut of the wiring screw 2e and the first part 200g of the pressure plate, and between the third part 220g of the pressure plate and the second part 21f of the nut; Figure 24 As shown, at this time, there is a large force between the nut of the wiring screw 2e and the first part 200g of the pressure plate, and between the second part 210g of the pressure plate and the first part 20f of the nut (because the connection between the first part 200g and the second part 210g of the pressure plate is compressed). When the wiring screw 2e is turned to move the nut 2f downward, the connection between the first part 200g and the second part 210g of the pressure plate, which is in a compressed state, gradually relaxes, causing the third part 220g of the pressure plate to gradually move downward, making it easier to disconnect the wiring terminal.

[0147] like Figures 25-30 The diagram shows another embodiment of the terminal block of the present invention.

[0148] The wire terminal comprises a wire screw 2e, a wire pressing plate 2g, a wire pressing plate mounting shaft 2h, a nut part 2f and a wire plate 2j; the wire screw 2e is in threaded connection with the nut part 2f; the wire pressing plate 2g comprises oppositely arranged upper and lower wire pressing plates 2g1 and 2g2, both of which are arranged obliquely relative to the wire plate 2j, and the connecting part of one end of the upper wire pressing plate 2g1 and one end of the lower wire pressing plate 2g2 is sleeved on the wire pressing plate mounting shaft 2h, and the free end of the lower wire pressing plate 2g2 and the free end of the upper wire pressing plate 2g1 are oppositely arranged relative to the wire plate 2j and used in cooperation; the wire is inserted between the wire pressing plate 2g and the wire plate 2j, the wire screw 2e is screwed, the nut part 2f moves along the axial direction of the wire screw 2e, and the nut part 2f drives the one end of the wire pressing plate 2g and the wire plate 2j to be lifted, so that the wire is pressed between the wire pressing plate 2g and the wire plate 2j. Further, the wire pressing plate 2g is limited and matched with the wire screw 2e, so as to prevent the wire pressing plate 2g from moving away from the wire plate 2j. Further, the nut part 2f is limited and prevented from rotating, the wire screw 2e is screwed, and the nut part 2f reciprocally moves along the axial direction of the wire screw 2e.

[0149] Preferably, as shown in Figure 26 、 27 , 29, the upper and lower wire pressing plates 2g1 and 2g2 are both L-shaped structures, the upper wire pressing plate 2g1 comprises an upper connecting part 2g11 and an upper wire pressing part 2g10, the upper wire pressing part 2g10 comprises a first wire pressing end and a first connecting end arranged at two ends thereof respectively, the first wire pressing end is oppositely arranged relative to the wire plate 2j and used in cooperation, the first connecting end is connected with one end of the upper connecting part 2g11, and the width of the first connecting end is greater than that of the upper connecting part 2g11; the lower wire pressing plate 2g2 comprises a lower connecting part 2g21 and a lower wire pressing part 2g20, the lower wire pressing part 2g20 comprises a second wire pressing end and a second connecting end arranged at two ends thereof respectively, the second wire pressing end is oppositely arranged relative to the wire plate 2j and used in cooperation, the second connecting end is connected with one end of the lower connecting part 2g21, and the width of the second connecting end is greater than that of the lower connecting part 2g21, and the other end of the lower connecting part 2g21 is connected with the other end of the upper connecting part 2g11; the first wire pressing end protrudes towards the wire plate 2j relative to the second wire pressing end, and the second connecting end protrudes towards the wire screw 2g relative to the first connecting end.

[0150] Specifically, as shown in Figure 27As shown by the arrows, the right end of the upper pressing wire part 2g10 and the right end of the lower pressing wire part 2g20 are respectively arranged opposite to the wiring board 2j and used in cooperation, the right end of the lower pressing wire part 2g20 protrudes to the direction of the wiring board 2j (to the right side) than the right end of the upper pressing wire part 2g10, the left end of the upper pressing wire part 2g10 protrudes to the direction of the wiring screw 2e (to the left side) than the left end of the lower pressing wire part 2g20; the wiring screw 2e is arranged between the pressing wire plate mounting shaft 2h and the upper pressing wire part 2g10 (and between the pressing wire plate mounting shaft 2h and the lower pressing wire part 2g20); by screwing the wiring screw 2e, the nut part 2f moves upward, and at the same time, the right end of the lower pressing wire part 2g20 and the upper pressing wire part 2g10 are lifted upward to press the wire tightly; if the outer diameter of the wire is relatively thin, only the lower pressing wire part 2g20 is needed to press the wire tightly, if the outer diameter of the wire is relatively large, the lower pressing wire part 2g20 and the upper pressing wire part 2g10 cooperate to press the wire tightly, thereby improving the wiring reliability of the wiring terminal of the application, and the wiring terminal of the application can be applied to wiring operation of wires with various outer diameters.

[0151] Preferably, as shown in Figure 27 , the lower pressing wire plate 2g2 further comprises a wire dismounting spring 2g22 arranged in the middle of the lower pressing wire part 2g20, one end of the wire dismounting spring 2g22 is connected with the lower pressing wire part 2g20, and the other end is arranged opposite to the upper pressing wire part 2g10 and used in cooperation. Further, as shown in Figure 27 , the included angle γ between the wire dismounting spring 2g22 and the lower pressing wire part 2g20 is less than 90°. When it is needed to dismount the wire from the wiring terminal of the application, the wiring screw 2e is screwed to make the nut part 2f move downward, and the wire dismounting spring 2g22 can provide elastic force to release the wire from the lower pressing wire part 2g20, thereby improving the convenience and efficiency of wire dismounting.

[0152] Preferably, as shown in Figure 25 , 26 , 28, the wiring terminal of the application further comprises two oppositely arranged fixing plates 2k, the wiring screw 2e, the nut part 2f, the pressing wire plate 2g and the wiring board 2j are all arranged between the two fixing plates 2k, the two fixing plates 2k limit the nut part 2f to prevent the nut part 2f from rotating, and the two ends of the pressing wire plate mounting shaft 2h are respectively connected with the two fixing plates 2k. Further, as shown in Figure 25 and 28 , the fixing plate 2k is provided with a nut part sliding groove 2k1, and the two ends of the nut part 2f are respectively provided with a nut part sliding platform 22f, and the two nut part sliding platforms 22f are respectively arranged in the two nut part sliding grooves 2k1. Further, as shown in Figure 26 , the fixing plate 2k is further provided with a wiring board limiting hole 2k3, and a pair of edges of the wiring board 2j are respectively provided with a wiring board limiting platform 2j0, and the two wiring board limiting platforms 2j0 are respectively arranged in the two wiring board limiting holes 2k3.

[0153] As Figure 25 and 26 As shown in the drawings, the wire pressing plate mounting shaft 25 is connected with the upper end of the two fixing plates 2k, specifically, the two ends of the wire pressing plate mounting shaft 25 are connected with the upper left corners of the two fixing plates 2k; the wire connecting plate 2j is arranged between the other ends of the two fixing plates 2k, specifically, the two ends of the wire connecting plate 2j are connected with the right ends of the two fixing plates 2k; one end of the wire pressing plate 2g is connected with the wire pressing plate mounting shaft 2h, and the other end is arranged opposite to the wire connecting plate 2j and cooperates with the wire connecting plate 2j, the wire pressing plate 2g is inclined downward from one end to the other end of the wire pressing plate 2g, specifically, the wire pressing plate 2g is gradually inclined downward from the left end to the right end of the wire pressing plate 2g; the wire pressing plate 2g has an overall L-shaped structure, the wire connecting screw 2e is arranged at the gap of the L-shaped structure of the wire pressing plate 2g and is screwed with the nut part 2f arranged below the wire pressing plate 2g, specifically, the wire connecting screw 2e is arranged at the front side of the upper connecting part 2g11 (lower connecting part 2g21) and is located at the left side of the upper wire pressing part 2g10 (lower wire pressing part 2g20).

[0154] Preferably, the side of the wire connecting plate 2j facing the wire pressing plate 2g is provided with a plurality of transverse grooves or transverse ribs arranged side by side, and the extension direction of the transverse grooves or transverse ribs is perpendicular to the direction of the wire insertion.

[0155] It should be pointed out that the wire connecting terminal of the present application can be used in the plug-in circuit breaker of the present application, and the first wire outlet terminal 11 and the second wire outlet terminal 10 of the plug-in circuit breaker can adopt the wire connecting terminal of the present application, which improves the wire connecting efficiency and the wire connecting reliability. Further, the circuit breaker shell is further provided with an auxiliary wire removal hole, each wire outlet terminal is correspondingly matched with an auxiliary wire removal hole, and the auxiliary wire removal hole is arranged on one side of the wire connecting screw 2e and is arranged opposite to the wire pressing plate 2g. Further, the auxiliary wire removal hole is arranged opposite to the end of the wire pressing plate 2g matched with the wire connecting plate 2j. When removing the wire, if the wire pressing plate 2g cannot automatically release the wire, the wire pressing plate 2g can be pressed through the auxiliary wire removal hole, so that the wire pressing plate 2g releases the wire, which is beneficial to improve the wire removal efficiency.

[0156] The above is a further detailed description of the present application in combination with specific preferred embodiments, and the specific implementation of the present application cannot be limited to these descriptions. For ordinary skilled persons in the technical field to which the present application belongs, a number of simple deductions or substitutions can be made without departing from the concept of the present application, and all of them should be regarded as falling within the protection scope of the present application.

Claims

1. A terminal block, characterized in that, It includes a wiring screw (2e), a wire clamping plate (2g), a nut (2f), and a terminal block (2j); the wiring screw (2e) is threadedly connected to the nut (2f); the wire clamping plate (2g) is disposed between the nut (2f) and the screw (2e), and is inclined relative to the terminal block (2j); the terminal block (2j) is fixedly disposed; one end of the wire clamping plate (2g) is limited, and the other end is disposed opposite to the terminal block (2j) to form a space for connecting wires; Tighten the terminal screw (2e) to move the nut (2f) axially along the terminal screw (2e). At the same time, the nut (2f) drives the end of the pressure plate (2g) that mates with the terminal plate (2j) to lift up, pressing the wire between the pressure plate (2g) and the terminal plate (2j). The terminal block also includes a pressure plate mounting shaft (2h) and a pressure plate reset torsion spring (2i); one end of the pressure plate (2g) is provided with a pressure plate bushing (20g), which is sleeved on the pressure plate mounting shaft (2h). The pressure plate mounting shaft (2h) is fixedly installed on the terminal assembly cavity for accommodating the terminal block. The first pressure plate reset torsion spring (2i) is sleeved on the pressure plate mounting shaft (2h), with one end connected to the cavity wall of the terminal assembly cavity and the other end connected to the pressure plate (2g).

2. The terminal block according to claim 1, characterized in that: The nut (2f) is limited to the terminal assembly cavity to prevent the nut (2f) from rotating. When the wiring screw (2e) is tightened, the nut (2f) moves back and forth along the axial direction of the wiring screw (2e).

3. The terminal block according to claim 1, characterized in that: The pressure plate (2g) includes a pressure plate bushing (20g), a first connecting part (21g), and a first pressure part (22g). One end of the first connecting part (21g) is connected to the pressure plate bushing (20g), and the other end is bent and connected to one end of the first pressure part (22g). The other end of the first pressure part (22g) is engaged with the terminal block (2j). The nut (2f) includes a first nut part (20f) that is threadedly connected to the terminal screw (2e) and a second nut part (21f) that is bent and connected to one end of the first nut part (20f). The first nut part (20f) is arranged opposite to and engaged with the first connecting part (21g), and the second nut part (21f) is arranged opposite to and engaged with the first pressure part (22g).

4. The terminal block according to claim 3, characterized in that: The angle α between the first connecting part (21g) and the first pressing part (22g) is greater than the angle β between the first part (20f) and the second part (21f) of the nut.

5. The terminal block according to claim 3, characterized in that: The pressure plate (2g) is in the shape of an L-shape. The width of the first pressure part (22g) is greater than the width of the first connecting part (21g). The length of the pressure plate bushing (20g) is the same as the width of the first connecting part (21g). The wiring screw (2e) is located at the notch of the L-shaped structure of the pressure plate (2g).

6. The terminal block according to any one of claims 1-5, characterized in that: The terminal block (2j) facing the wire pressure plate (2g) has multiple horizontal grooves or horizontal ribs arranged side by side, and the extension direction of the horizontal grooves or horizontal ribs is perpendicular to the direction of wire insertion.

7. A plug-in circuit breaker, characterized in that, It includes the terminal block as described in any one of claims 1-5.

8. The plug-in circuit breaker according to claim 7, characterized in that: The plug-in circuit breaker includes a circuit breaker housing and at least one protective electrode. The circuit breaker housing includes at least one protective electrode assembly cavity. Each protective electrode includes an operation button (1d), an operation mechanism (3) connected to the operation button (1d), a protection mechanism (4) cooperating with the operation mechanism (3), an arc extinguishing system (5), a first incoming terminal (110), a first outgoing terminal (11), a moving contact (61) connected to the operation mechanism (3), and a stationary contact (62) cooperating with the moving contact (61). The first outgoing terminal (11) is the wiring terminal. One end of the operation button (1d) is inserted into the circuit breaker housing. The operation button (1d) and the first outgoing terminal (11) are located at one end of the circuit breaker housing, and the first incoming terminal (110) is located at the other end of the circuit breaker housing. The arc extinguishing system (5) is located in the middle of the protective electrode assembly cavity and is located on one side of the first incoming terminal (110). The operation mechanism (3) is located between the operation button (1d) and the arc extinguishing system (5). The protection mechanism (4) is located between the first outgoing terminal (11) and the arc extinguishing system (5) and is located on one side of the operation mechanism (3). When the plug-in circuit breaker is in the closed state and the operating mechanism (3) is in the latched state, when a short circuit fault or overload fault occurs, the protection mechanism (4) drives the operating mechanism (3) to trip, the plug-in circuit breaker trips and the operating mechanism (3) enters the tripped state. Pulling the operating button (1d) moves it in the opening direction, drives the operating mechanism (3) back to the latched state, and the plug-in circuit breaker enters the opening state.

9. The plug-in circuit breaker according to claim 8, characterized in that: The operating mechanism (3) includes a U-shaped connecting rod (35), an operating handle (30), a contact support rod (31), a jump buckle (32), a lock buckle (36), a lock buckle return spring (37), and a main tension spring (33); The operating handle (30) is pivotally mounted on the circuit breaker housing. One end of the operating handle (30) is driven and connected to the operating button (1d) through a U-shaped connecting rod (35), and the other end is rotatably connected to one end of the contact support rod (31). The other end of the contact support rod (31) is provided with a moving contact (61). One end of the trip buckle (32) is pivotally mounted on the circuit breaker housing, and the middle part is connected to the end of the contact support rod (31) with the moving contact (61) through a main tension spring (33). The latch (36) is rotatably mounted in the middle, and one end is connected to the circuit breaker housing through a latch return spring (37). The other end is driven and engaged with the protection mechanism (4) and latched with the other end of the trip buckle (32).

10. The plug-in circuit breaker according to claim 9, characterized in that: The protection mechanism (4) includes a magnetic yoke (40) and a bimetallic strip (42). The magnetic yoke (40) is disposed on one side of the latch (36), and the bimetallic strip (42) is disposed in the middle of the magnetic yoke (40) and located between the magnetic yoke (40) and the latch (36). One end of the bimetallic strip (42) is fixedly disposed and electrically connected to the first outgoing terminal (11), and the other end is driven to cooperate with the latch (36) and electrically connected to the moving contact (61). When the plug-in circuit breaker is in the closed state and a short circuit fault occurs, the latch (36) is attracted and swings towards the direction of the magnetic yoke (40), releasing the latching engagement with the trip latch (32); when the plug-in circuit breaker is in the closed state and an overload fault occurs, the bimetallic strip (42) drives the latch (36) to swing towards the direction of the magnetic yoke (40), releasing the latching engagement with the trip latch (32).

11. The plug-in circuit breaker according to claim 10, characterized in that: The latch (36) is rotatably mounted on one end of the magnetic yoke (40). One end of the latch (36) is connected to the circuit breaker housing via a latch return spring (37), and the other end is positioned opposite to the magnetic yoke (40). One end of the bimetallic strip (42) is fixedly mounted and electrically connected to the first outgoing terminal (11) via a first conductive plate (2b), and the other end is electrically connected to the contact support rod (31) via a flexible connector (63). The stationary contact (62) is electrically connected to the first incoming terminal (110).

12. The plug-in circuit breaker according to claim 8, characterized in that: The circuit breaker housing is also provided with an auxiliary wire disconnection hole, which is located on the side of the wiring screw (2e) and opposite to the pressure plate (2g).

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